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Abu Aiyub Al-Ansari (RAA) narrated that The Messenger of Allah (P.B.U.H.) said, "Whoever fasts during the month of Ramadan and then follows it with six days of Shawwal will be (rewarded) as if he had fasted the entire year." Related by Muslim.
وَعَنْ أَبِي أَيُّوبَ اَلْأَنْصَارِيِّ ‏- رضى الله عنه ‏- أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-قَالَ: { مَنْ صَامَ رَمَضَانَ, ثُمَّ أَتْبَعَهُ سِتًّا مِنْ شَوَّالٍ كَانَ كَصِيَامِ اَلدَّهْرِ } رَوَاهُ مُسْلِمٌ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 32
English translation : Book 5, Hadith 701
Arabic reference : Book 5, Hadith 681
Sunan Ibn Majah 1716
It was narrated from Abu Ayyub that the Messenger of Allah (saw) said:
Whoever fasts Ramadan then follows it with six days of Shawwal, it is as if he fasted for a lifetime.”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ نُمَيْرٍ، عَنْ سَعْدِ بْنِ سَعِيدٍ، عَنْ عُمَرَ بْنِ ثَابِتٍ، عَنْ أَبِي أَيُّوبَ، قَالَ: قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏ "‏ مَنْ صَامَ رَمَضَانَ ثُمَّ أَتْبَعَهُ بِسِتٍّ مِنْ شَوَّالٍ، كَانَ كَصَوْمِ الدَّهْرِ ‏"‏ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 1716
In-book reference : Book 7, Hadith 79
English translation : Vol. 1, Book 7, Hadith 1716
Jami` at-Tirmidhi 759
Abu Ayub narrated that :
the Messenger of Allah said: "Whoever fasts Ramadan, then follows it with six from Shawwal, then that is (equal in reward) to fasting everyday."
حَدَّثَنَا أَحْمَدُ بْنُ مَنِيعٍ، حَدَّثَنَا أَبُو مُعَاوِيَةَ، حَدَّثَنَا سَعْدُ بْنُ سَعِيدٍ، عَنْ عُمَرَ بْنِ ثَابِتٍ، عَنْ أَبِي أَيُّوبَ، قَالَ قَالَ النَّبِيُّ صلى الله عليه وسلم ‏"‏ مَنْ صَامَ رَمَضَانَ ثُمَّ أَتْبَعَهُ سِتًّا مِنْ شَوَّالٍ فَذَلِكَ صِيَامُ الدَّهْرِ ‏"‏ ‏.‏ وَفِي الْبَابِ عَنْ جَابِرٍ وَأَبِي هُرَيْرَةَ وَثَوْبَانَ ‏.‏ قَالَ أَبُو عِيسَى حَدِيثُ أَبِي أَيُّوبَ حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏ وَقَدِ اسْتَحَبَّ قَوْمٌ صِيَامَ سِتَّةِ أَيَّامٍ مِنْ شَوَّالٍ بِهَذَا الْحَدِيثِ ‏.‏ قَالَ ابْنُ الْمُبَارَكِ هُوَ حَسَنٌ هُوَ مِثْلُ صِيَامِ ثَلاَثَةِ أَيَّامٍ مِنْ كُلِّ شَهْرٍ ‏.‏ قَالَ ابْنُ الْمُبَارَكِ وَيُرْوَى فِي بَعْضِ الْحَدِيثِ ‏"‏ وَيُلْحَقُ هَذَا الصِّيَامُ بِرَمَضَانَ ‏"‏ ‏.‏ وَاخْتَارَ ابْنُ الْمُبَارَكِ أَنْ تَكُونَ سِتَّةَ أَيَّامٍ فِي أَوَّلِ الشَّهْرِ ‏.‏ وَقَدْ رُوِيَ عَنِ ابْنِ الْمُبَارَكِ أَنَّهُ قَالَ إِنْ صَامَ سِتَّةَ أَيَّامٍ مِنْ شَوَّالٍ مُتَفَرِّقًا فَهُوَ جَائِزٌ ‏.‏ قَالَ وَقَدْ رَوَى عَبْدُ الْعَزِيزِ بْنُ مُحَمَّدٍ عَنْ صَفْوَانَ بْنِ سُلَيْمٍ وَسَعْدِ بْنِ سَعِيدٍ عَنْ عُمَرَ بْنِ ثَابِتٍ عَنْ أَبِي أَيُّوبَ عَنِ النَّبِيِّ صلى الله عليه وسلم هَذَا ‏.‏ وَرَوَى شُعْبَةُ عَنْ وَرْقَاءَ بْنِ عُمَرَ عَنْ سَعْدِ بْنِ سَعِيدٍ هَذَا الْحَدِيثَ ‏.‏ وَسَعْدُ بْنُ سَعِيدٍ هُوَ أَخُو يَحْيَى بْنِ سَعِيدٍ الأَنْصَارِيِّ وَقَدْ تَكَلَّمَ بَعْضُ أَهْلِ الْحَدِيثِ فِي سَعْدِ بْنِ سَعِيدٍ ...
Grade: Sahih (Darussalam)
Reference : Jami` at-Tirmidhi 759
In-book reference : Book 8, Hadith 78
English translation : Vol. 2, Book 3, Hadith 759
Sunan Abi Dawud 2433
Narrated Abu Ayyub:
The Prophet (saws) as saying: If anyone fasts during Ramadan, then follows it with six days in Shawwal, it will be like a perpetual fast.
حَدَّثَنَا النُّفَيْلِيُّ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ مُحَمَّدٍ، عَنْ صَفْوَانَ بْنِ سُلَيْمٍ، وَسَعْدِ بْنِ سَعِيدٍ، عَنْ عُمَرَ بْنِ ثَابِتٍ الأَنْصَارِيِّ، عَنْ أَبِي أَيُّوبَ، صَاحِبِ النَّبِيِّ صلى الله عليه وسلم عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ صَامَ رَمَضَانَ ثُمَّ أَتْبَعَهُ بِسِتٍّ مِنْ شَوَّالٍ فَكَأَنَّمَا صَامَ الدَّهْرَ ‏"‏ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2433
In-book reference : Book 14, Hadith 121
English translation : Book 13, Hadith 2427
Riyad as-Salihin 1254
Abu Ayyub (May Allah be pleased with him) reported:
The Messenger of Allah (PBUH) said, "He who observes As-Saum (the fasts) in the month of Ramadan, and also observes As-Saum for six days in the month of Shawwal, it is as if he has observed As-Saum for the whole year."

[Muslim].

عن أبي أيوب رضي الله عنه أن رسول الله صلى الله عليه وسلم قال‏:‏ ‏ "‏من صام رمضان ثم أتبعه بست من شوال كان كصيام الدهر‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏
Reference : Riyad as-Salihin 1254
In-book reference : Book 8, Hadith 264
Mishkat al-Masabih 2047
Abu Ayyub al-Ansari told that God’s messenger said, “If anyone fasts during Ramadan, then follows it with six days in Shawwal, it will be like a perpetual fast.” Muslim transmitted it.
وَعَنْ أَبِي أَيُّوبَ الْأَنْصَارِيِّ أَنَّهُ حَدَّثَهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «مَنْ صَامَ رَمَضَانَ ثُمَّ أَتْبَعَهُ سِتًّا مِنْ شَوَّال كَانَ كصيام الدَّهْر» . رَوَاهُ مُسلم
  صَحِيح   (الألباني) حكم   :
Reference : Mishkat al-Masabih 2047
In-book reference : Book 7, Hadith 90
Sahih Muslim 1164 a

Abu Ayyub al-Ansari (Allah be pleased with him) reported Allah's Messenger (may peace be upon him) as saying:

He who observed the fast of Ramadan and then followed it with six (fasts) of Shawwal. it would be as if he fasted perpetually.
حَدَّثَنَا يَحْيَى بْنُ أَيُّوبَ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، وَعَلِيُّ بْنُ حُجْرٍ، جَمِيعًا عَنْ إِسْمَاعِيلَ، - قَالَ ابْنُ أَيُّوبَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ، - أَخْبَرَنِي سَعْدُ بْنُ سَعِيدِ بْنِ قَيْسٍ، عَنْ عُمَرَ، بْنِ ثَابِتِ بْنِ الْحَارِثِ الْخَزْرَجِيِّ عَنْ أَبِي أَيُّوبَ الأَنْصَارِيِّ، - رضى الله عنه - أَنَّهُ حَدَّثَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ صَامَ رَمَضَانَ ثُمَّ أَتْبَعَهُ سِتًّا مِنْ شَوَّالٍ كَانَ كَصِيَامِ الدَّهْرِ ‏"‏ ‏.‏
Reference : Sahih Muslim 1164a
In-book reference : Book 13, Hadith 264
USC-MSA web (English) reference : Book 6, Hadith 2614
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Sunan an-Nasa'i 2387
It was narrated that Abu Qatadah said:
"Umar said: 'O Messenger of Allah, what about a person who fasted for an entire lifetime?' He said: 'He neither fasted nor broke his fast for one day?' He said: 'Can anyone do that?' He said: 'What about a person who fasted for one day?' He said: 'That is the fast of Dawud, peace be upon him.' He said: 'What about a person who fasted for one day, and broke his fast for two days?' he said: 'I wish that I could do that.' Then he said: 'Three days of each month, and from Ramadan to Ramadan, this is fasting for an entire lifetime."' 'Ata said: "someone who heard him told me that Ibn 'Umar (said) that the Prophet said: 'Whoever fasts every day of his life, then he has not fasted."
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ غَيْلاَنَ بْنِ جَرِيرٍ، عَنْ عَبْدِ اللَّهِ بْنِ مَعْبَدٍ الزِّمَّانِيِّ، عَنْ أَبِي قَتَادَةَ، قَالَ قَالَ عُمَرُ يَا رَسُولَ اللَّهِ كَيْفَ بِمَنْ يَصُومُ الدَّهْرَ كُلَّهُ قَالَ ‏"‏ لاَ صَامَ وَلاَ أَفْطَرَ أَوْ لَمْ يَصُمْ وَلَمْ يُفْطِرْ ‏"‏ ‏.‏ قَالَ يَا رَسُولَ اللَّهِ كَيْفَ بِمَنْ يَصُومُ يَوْمَيْنِ وَيُفْطِرُ يَوْمًا قَالَ ‏"‏ أَوَيُطِيقُ ذَلِكَ أَحَدٌ ‏"‏ ‏.‏ قَالَ فَكَيْفَ بِمَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمًا قَالَ ‏"‏ ذَلِكَ صَوْمُ دَاوُدَ عَلَيْهِ السَّلاَمُ ‏"‏ ‏.‏ قَالَ فَكَيْفَ بِمَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمَيْنِ قَالَ ‏"‏ وَدِدْتُ أَنِّي أُطِيقُ ذَلِكَ ‏"‏ ‏.‏ قَالَ ثُمَّ قَالَ ‏"‏ ثَلاَثٌ مِنْ كُلِّ شَهْرٍ وَرَمَضَانُ إِلَى رَمَضَانَ هَذَا صِيَامُ الدَّهْرِ كُلِّهِ ‏"‏ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2387
In-book reference : Book 22, Hadith 298
English translation : Vol. 3, Book 22, Hadith 2389
Sahih al-Bukhari 1909

Narrated Abu Huraira:

The Prophet or Abul-Qasim said, "Start fasting on seeing the crescent (of Ramadan), and give up fasting on seeing the crescent (of Shawwal), and if the sky is overcast (and you cannot see it), complete thirty days of Sha'ban."

حَدَّثَنَا آدَمُ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنَا مُحَمَّدُ بْنُ زِيَادٍ، قَالَ سَمِعْتُ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ يَقُولُ قَالَ النَّبِيُّ صلى الله عليه وسلم أَوْ قَالَ قَالَ أَبُو الْقَاسِمِ صلى الله عليه وسلم ‏ "‏ صُومُوا لِرُؤْيَتِهِ، وَأَفْطِرُوا لِرُؤْيَتِهِ، فَإِنْ غُبِّيَ عَلَيْكُمْ فَأَكْمِلُوا عِدَّةَ شَعْبَانَ ثَلاَثِينَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1909
In-book reference : Book 30, Hadith 19
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 133
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Sahih al-Bukhari 1906

Narrated `Abdullah bin `Umar:

Allah's Apostle mentioned Ramadan and said, "Do not fast unless you see the crescent (of Ramadan), and do not give up fasting till you see the crescent (of Shawwal), but if the sky is overcast (if you cannot see it), then act on estimation (i.e. count Sha'ban as 30 days).

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم ذَكَرَ رَمَضَانَ فَقَالَ ‏ "‏ لاَ تَصُومُوا حَتَّى تَرَوُا الْهِلاَلَ، وَلاَ تُفْطِرُوا حَتَّى تَرَوْهُ، فَإِنْ غُمَّ عَلَيْكُمْ فَاقْدُرُوا لَهُ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1906
In-book reference : Book 30, Hadith 16
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 130
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Yahya related to me from Malik that he had heard that once in the time of Uthman ibn Affan the new moon had been seen in the afternoon and Uthman did not break his fast until evening had come and the sun had set.

Yahya said that he had heard Malik say that some one who sees the new moon of Ramadan when he is on his own should start the fast and not break it if he knows that that day is part of Ramadan. He added, "Some one who sees the new moon of Shawwal when he is on his own does not break the fast, because people suspect the reliability of someone among them who breaks the fast. Such people should say, when they sight the new moon, 'We have seen the new moon.' Whoever sees the new moon of Shawwal during the day should not break his fast but should continue fasting for the rest of that day. This is because it is really the new moon of the night that is coming ."

Yahya said that he heard Malik say, "If people are fasting on the day of Fitr thinking that it is still Ramadan and then definite evidence comes to them that the new moon of Ramadan had been seen one day before they began to fast and that they are now into the thirty- first day, then they should break the fast on that day at whatever time the news comes to them. However, they do not pray the id prayer if they hear the news after the sun has begun to decline."

وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ الْهِلاَلَ، رُئِيَ فِي زَمَانِ عُثْمَانَ بْنِ عَفَّانَ بِعَشِيٍّ فَلَمْ يُفْطِرْ عُثْمَانُ حَتَّى أَمْسَى وَغَابَتِ الشَّمْسُ ‏.‏ قَالَ يَحْيَى سَمِعْتُ مَالِكًا يَقُولُ فِي الَّذِي يَرَى هِلاَلَ رَمَضَانَ وَحْدَهُ أَنَّهُ يَصُومُ لاَ يَنْبَغِي لَهُ أَنْ يُفْطِرَ وَهُوَ يَعْلَمُ أَنَّ ذَلِكَ الْيَوْمَ مِنْ رَمَضَانَ ‏.‏ قَالَ وَمَنْ رَأَى هِلاَلَ شَوَّالٍ وَحْدَهُ فَإِنَّهُ لاَ يُفْطِرُ لأَنَّ النَّاسَ يَتَّهِمُونَ عَلَى أَنْ يُفْطِرَ مِنْهُمْ مَنْ لَيْسَ مَأْمُونًا وَيَقُولُ أُولَئِكَ إِذَا ظَهَرَ عَلَيْهِمْ قَدْ رَأَيْنَا الْهِلاَلَ وَمَنْ رَأَى هِلاَلَ شَوَّالٍ نَهَارًا فَلاَ يُفْطِرْ وَيُتِمُّ صِيَامَ يَوْمِهِ ذَلِكَ فَإِنَّمَا هُوَ هِلاَلُ اللَّيْلَةِ الَّتِي تَأْتِي ‏.‏ قَالَ يَحْيَى وَسَمِعْتُ مَالِكًا يَقُولُ إِذَا صَامَ النَّاسُ يَوْمَ الْفِطْرِ - وَهُمْ يَظُنُّونَ أَنَّهُ مِنْ رَمَضَانَ - فَجَاءَهُمْ ثَبَتٌ أَنَّ هِلاَلَ رَمَضَانَ قَدْ رُئِيَ قَبْلَ أَنْ يَصُومُوا بِيَوْمٍ وَأَنَّ يَوْمَهُمْ ذَلِكَ أَحَدٌ وَثَلاَثُونَ فَإِنَّهُمْ يُفْطِرُونَ فِي ذَلِكَ الْيَوْمِ أَيَّةَ سَاعَةٍ جَاءَهُمُ الْخَبَرُ غَيْرَ أَنَّهُمْ لاَ يُصَلُّونَ صَلاَةَ الْعِيدِ إِنْ كَانَ ذَلِكَ جَاءَهُمْ بَعْدَ زَوَالِ الشَّمْسِ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 4
Arabic reference : Book 18, Hadith 636
Riyad as-Salihin 1225
Ibn 'Abbas (May Allah be pleased with them) reported:
The Messenger of Allah (PBUH) said, "Do not observe Saum (fasting) before the advent of Ramadan. Observe Saum at sighting of the crescent of Ramadan and terminate it at sighting the crescent (of Shawwal). If the sky is overcast, complete (the month as) thirty (days)."

[At- Tirmidhi].

وعن ابن عباس رضي الله عنهما قال‏:‏ قال رسول الله صلى الله عليه وسلم ‏ "‏ لا تصوموا قبل رمضان صوموا لرؤيته وأفطروا لرؤيته، فإن حالت دونه فأكملوا ثلاثين يومًا‏"‏ ‏(‏‏(‏رواه الترمذي وقال حديث حسن صحيح‏.‏
Reference : Riyad as-Salihin 1225
In-book reference : Book 8, Hadith 235
Sahih al-Bukhari 4504

Narrated Aisha:

During the Pre-lslamic Period of ignorance the Quraish used to observe fasting on the day of 'Ashura', and the Prophet himself used to observe fasting on it too. But when he came to Medina, he fasted on that day and ordered the Muslims to fast on it. When (the order of compulsory fasting in ) Ramadan was revealed, fasting in Ramadan became an obligation, and fasting on 'Ashura' was given up, and who ever wished to fast (on it) did so, and whoever did not wish to fast on it, did not fast.

حَدَّثَنِي مُحَمَّدُ بْنُ الْمُثَنَّى، حَدَّثَنَا يَحْيَى، حَدَّثَنَا هِشَامٌ، قَالَ أَخْبَرَنِي أَبِي، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانَ يَوْمُ عَاشُورَاءَ تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ، وَكَانَ النَّبِيُّ صلى الله عليه وسلم يَصُومُهُ، فَلَمَّا قَدِمَ الْمَدِينَةَ صَامَهُ وَأَمَرَ بِصِيَامِهِ، فَلَمَّا نَزَلَ رَمَضَانُ كَانَ رَمَضَانُ الْفَرِيضَةَ، وَتُرِكَ عَاشُورَاءُ، فَكَانَ مَنْ شَاءَ صَامَهُ، وَمَنْ شَاءَ لَمْ يَصُمْهُ‏.‏
Reference : Sahih al-Bukhari 4504
In-book reference : Book 65, Hadith 31
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 31
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Sahih al-Bukhari 1983

Narrated Mutarrif from `Imran Ibn Husain:

That the Prophet asked him (Imran) or asked a man and `Imran was listening, "O Abu so-and-so! Have you fasted the last days of this month?" (The narrator thought that he said, "the month of Ramadan"). The man replied, "No, O Allah's Apostle!" The Prophet said to him, "When you finish your fasting (of Ramadan) fast two days (in Shawwal)." Through another series of narrators `Imran said, "The Prophet said, '(Have you fasted) the last days of Sha'ban?"

حَدَّثَنَا الصَّلْتُ بْنُ مُحَمَّدٍ، حَدَّثَنَا مَهْدِيٌّ، عَنْ غَيْلاَنَ،‏.‏ وَحَدَّثَنَا أَبُو النُّعْمَانِ، حَدَّثَنَا مَهْدِيُّ بْنُ مَيْمُونٍ، حَدَّثَنَا غَيْلاَنُ بْنُ جَرِيرٍ، عَنْ مُطَرِّفٍ، عَنْ عِمْرَانَ بْنِ حُصَيْنٍ ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم‏.‏ أَنَّهُ سَأَلَهُ ـ أَوْ سَأَلَ رَجُلاً وَعِمْرَانُ يَسْمَعُ ـ فَقَالَ ‏"‏ يَا أَبَا فُلاَنٍ أَمَا صُمْتَ سَرَرَ هَذَا الشَّهْرِ ‏"‏‏.‏ قَالَ أَظُنُّهُ قَالَ يَعْنِي رَمَضَانَ‏.‏ قَالَ الرَّجُلُ لاَ يَا رَسُولَ اللَّهِ‏.‏ قَالَ ‏"‏ فَإِذَا أَفْطَرْتَ فَصُمْ يَوْمَيْنِ ‏"‏‏.‏ لَمْ يَقُلِ الصَّلْتُ أَظُنُّهُ يَعْنِي رَمَضَانَ‏.‏ قَالَ أَبُو عَبْدِ اللَّهِ وَقَالَ ثَابِثٌ عَنْ مُطَرِّفٍ عَنْ عِمْرَانَ عَنِ النَّبِيِّ صلى الله عليه وسلم ‏"‏ مِنْ سَرَرِ شَعْبَانَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1983
In-book reference : Book 30, Hadith 90
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 204
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Sahih al-Bukhari 1900

Narrated Ibn `Umar:

I heard Allah's Apostle saying, "When you see the crescent (of the month of Ramadan), start fasting, and when you see the crescent (of the month of Shawwal), stop fasting; and if the sky is overcast (and you can't see it) then regard the month of Ramadan as of 30 days."

حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، قَالَ حَدَّثَنِي اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي سَالِمٌ، أَنَّ ابْنَ عُمَرَ ـ رضى الله عنهما ـ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ ‏ "‏ إِذَا رَأَيْتُمُوهُ فَصُومُوا، وَإِذَا رَأَيْتُمُوهُ فَأَفْطِرُوا، فَإِنْ غُمَّ عَلَيْكُمْ فَاقْدُرُوا لَهُ ‏"‏‏.‏ وَقَالَ غَيْرُهُ عَنِ اللَّيْثِ حَدَّثَنِي عُقَيْلٌ وَيُونُسُ لِهِلاَلِ رَمَضَانَ‏.‏
Reference : Sahih al-Bukhari 1900
In-book reference : Book 30, Hadith 10
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 124
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Sahih Muslim 1081 a

Abu Huraira reported Allah's Messenger (may peace be upon him) as saying:

Whenever you sight the new moon (of the month of Ramadan) observe fast. and when you sight it (the new moon of Shawwal) break it, and if the sky is cloudy for you, then observe fast for thirty days.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، أَخْبَرَنَا إِبْرَاهِيمُ بْنُ سَعْدٍ، عَنِ ابْنِ شِهَابٍ، عَنْ سَعِيدِ بْنِ، الْمُسَيَّبِ عَنْ أَبِي هُرَيْرَةَ، - رضى الله عنه - قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ إِذَا رَأَيْتُمُ الْهِلاَلَ فَصُومُوا وَإِذَا رَأَيْتُمُوهُ فَأَفْطِرُوا فَإِنْ غُمَّ عَلَيْكُمْ فَصُومُوا ثَلاَثِينَ يَوْمًا ‏"‏ ‏.‏
Reference : Sahih Muslim 1081a
In-book reference : Book 13, Hadith 20
USC-MSA web (English) reference : Book 6, Hadith 2378
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Sahih Muslim 1080 e

Ibn'Umar (Allah be pleased with-both of them) reported Allah's Messenger (may peace be upon him) as saying:

The month of Ramadan may consist of twenty-nine days. So do not fast till you have sighted it (the new moon) and do not break fast, till you have sighted it (the new moon of Shawwal), and if the sky is cloudy for you, then calculate.
وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، - رضى الله عنهما - قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ إِنَّمَا الشَّهْرُ تِسْعٌ وَعِشْرُونَ فَلاَ تَصُومُوا حَتَّى تَرَوْهُ وَلاَ تُفْطِرُوا حَتَّى تَرَوْهُ فَإِنْ غُمَّ عَلَيْكُمْ فَاقْدِرُوا لَهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1080e
In-book reference : Book 13, Hadith 8
USC-MSA web (English) reference : Book 6, Hadith 2367
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Sunan Ibn Majah 1672
It was narrated from Abu Hurairah that the Messenger of Allah (saw) said:
Whoever does not fast one day in Ramadan without having a concession allowing that, fasting for a lifetime will not make up for that.”
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنْ سُفْيَانَ، عَنْ حَبِيبِ بْنِ أَبِي ثَابِتٍ، عَنِ ابْنِ الْمُطَوِّسِ، عَنْ أَبِيهِ الْمُطَوِّسِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ: قَالَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ ‏ "‏ مَنْ أَفْطَرَ يَوْمًا مِنْ رَمَضَانَ مِنْ غَيْرِ رُخْصَةٍ لَمْ يُجْزِهِ صِيَامُ الدَّهْرِ ‏"‏ ‏.‏
Grade: Da’if (Darussalam)
Reference : Sunan Ibn Majah 1672
In-book reference : Book 7, Hadith 35
English translation : Vol. 1, Book 7, Hadith 1672
'A’isha (RAA) narrated that The Messenger of Allah (P.B.U.H.) said, "Whoever dies while he still has some fasts to make up (of the days of Ramadan), then his heir (any of them) should fast on his behalf.” Agreed upon.
وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا; أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-قَالَ: { مَنْ مَاتَ وَعَلَيْهِ صِيَامٌ صَامَ عَنْهُ وَلِيُّهُ } مُتَّفَقٌ عَلَيْهِ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 30
English translation : Book 5, Hadith 699
Arabic reference : Book 5, Hadith 679
Sahih Muslim 1080 b

Ibn Umar reported that Allah's Messenger (may peace be upon him) made a mention of Ramadan and he with the gesture of his hand said:

The month is thus and thus. (He then withdrew his thumb at the third time). He then said: Fast when you see it, and break your fast when you see it, and if the weather is cloudy calculate it (the months of Sha'ban and Shawwal) as thirty days.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، رضى الله عنهما أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم ذَكَرَ رَمَضَانَ فَضَرَبَ بِيَدَيْهِ فَقَالَ ‏ "‏ الشَّهْرُ هَكَذَا وَهَكَذَا وَهَكَذَا - ثُمَّ عَقَدَ إِبْهَامَهُ فِي الثَّالِثَةِ - فَصُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ أُغْمِيَ عَلَيْكُمْ فَاقْدِرُوا لَهُ ثَلاَثِينَ ‏"‏ ‏.‏
Reference : Sahih Muslim 1080b
In-book reference : Book 13, Hadith 5
USC-MSA web (English) reference : Book 6, Hadith 2364
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Yahya related to me from Malik that he had heard the people of knowledge telling people not to fast on the day in Shaban when there was doubt (about whether it was Shaban or Ramadan), if they intended by it the fast of Ramadan . They considered that whoever fasted on that day without having seen (the new moon) had to make up that day if it later became clear that it was part of Ramadan. They did not see any harm in voluntary fasting on that day.

Malik said, "This is what we do, and what I have seen the people of knowledge in our city doing."

USC-MSA web (English) reference : Book 18, Hadith 55
Jami` at-Tirmidhi 753
Aishah narrated:
"Ashura was a day that the Quraish used to fast during Jahiliyyah, and the Messenger of Allah used to fast it. But when (the fast of) Ramadan became obligatory, the Ramadan was the required and Ashura was left. So whoever wanted to, he fasted it, and whoever wanted to, he left it."
حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ الْهَمْدَانِيُّ، حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ كَانَ عَاشُورَاءُ يَوْمًا تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُهُ فَلَمَّا قَدِمَ الْمَدِينَةَ صَامَهُ وَأَمَرَ النَّاسَ بِصِيَامِهِ فَلَمَّا افْتُرِضَ رَمَضَانُ كَانَ رَمَضَانُ هُوَ الْفَرِيضَةَ وَتَرَكَ عَاشُورَاءَ فَمَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ ‏.‏ وَفِي الْبَابِ عَنِ ابْنِ مَسْعُودٍ وَقَيْسِ بْنِ سَعْدٍ وَجَابِرِ بْنِ سَمُرَةَ وَابْنِ عُمَرَ وَمُعَاوِيَةَ ‏.‏ قَالَ أَبُو عِيسَى وَالْعَمَلُ عِنْدَ أَهْلِ الْعِلْمِ عَلَى حَدِيثِ عَائِشَةَ وَهُوَ حَدِيثٌ صَحِيحٌ لاَ يَرَوْنَ صِيَامَ يَوْمِ عَاشُورَاءَ وَاجِبًا إِلاَّ مَنْ رَغِبَ فِي صِيَامِهِ لِمَا ذُكِرَ فِيهِ مِنَ الْفَضْلِ ‏.‏
Grade: Sahih (Darussalam)
Reference : Jami` at-Tirmidhi 753
In-book reference : Book 8, Hadith 72
English translation : Vol. 2, Book 3, Hadith 753
Sunan an-Nasa'i 2314
It was narrated that Ibn 'Abbas said:
"The Messenger of Allah traveled and fasted until he reached 'Usfan, then he called for a cup and drank durink the day when the people could see him. Hen he did not fast until he reached Makkah, and he conquered Makkah during Ramadan." Ibn 'Abbas said: "And the Messenger of Allah fasted until he reach Makkah, and he conquered Makkah during Ramadan." Ibn 'Abbas said: "And the Messenger of Allah fasted and broke his fast while traveling, so whoever wishes may fast, and whoever wishes may not fast."
أَخْبَرَنَا مُحَمَّدُ بْنُ رَافِعٍ، قَالَ حَدَّثَنَا يَحْيَى بْنُ آدَمَ، قَالَ حَدَّثَنَا مُفَضَّلٌ، عَنْ مَنْصُورٍ، عَنْ مُجَاهِدٍ، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ سَافَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَصَامَ حَتَّى بَلَغَ عُسْفَانَ ثُمَّ دَعَا بِإِنَاءٍ فَشَرِبَ نَهَارًا لِيَرَاهُ النَّاسُ ثُمَّ أَفْطَرَ حَتَّى دَخَلَ مَكَّةَ فَافْتَتَحَ مَكَّةَ فِي رَمَضَانَ قَالَ ابْنُ عَبَّاسٍ فَصَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم فِي السَّفَرِ وَأَفْطَرَ فَمَنْ شَاءَ صَامَ وَمَنْ شَاءَ أَفْطَرَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2314
In-book reference : Book 22, Hadith 225
English translation : Vol. 3, Book 22, Hadith 2316
Jami` at-Tirmidhi 768
Abdullah bin Shaqiq narrated:
"I asked Aishah about the Prophet's fasting.' She said: 'He would fast until we said: "He has fasted" and he would abstain from fasting until we said: "He has abstained from fasting." (She said:) 'The Messenger of Allah did not fast an entire month except Ramadan.'"
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ أَيُّوبَ، عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ، قَالَ سَأَلْتُ عَائِشَةَ عَنْ صِيَامِ النَّبِيِّ، صلى الله عليه وسلم قَالَتْ كَانَ يَصُومُ حَتَّى نَقُولَ قَدْ صَامَ وَيُفْطِرُ حَتَّى نَقُولَ قَدْ أَفْطَرَ ‏.‏ قَالَتْ وَمَا صَامَ رَسُولُ اللَّهُ صلى الله عليه وسلم شَهْرًا كَامِلاً إِلاَّ رَمَضَانَ ‏.‏ وَفِي الْبَابِ عَنْ أَنَسٍ وَابْنِ عَبَّاسٍ ‏.‏ قَالَ أَبُو عِيسَى حَدِيثُ عَائِشَةَ حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏
Grade: Sahih (Darussalam)
Reference : Jami` at-Tirmidhi 768
In-book reference : Book 8, Hadith 87
English translation : Vol. 2, Book 3, Hadith 768
Sahih al-Bukhari 1592

Narrated `Aisha:

The people used to fast on 'Ashura (the tenth day of the month of Muharram) before the fasting of Ramadan was made obligatory. And on that day the Ka`ba used to be covered with a cover. When Allah made the fasting of the month of Ramadan compulsory, Allah's Apostle said, "Whoever wishes to fast (on the day of 'Ashura') may do so; and whoever wishes to leave it can do so."

حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ‏.‏ وَحَدَّثَنِي مُحَمَّدُ بْنُ مُقَاتِلٍ، قَالَ أَخْبَرَنِي عَبْدُ اللَّهِ ـ هُوَ ابْنُ الْمُبَارَكِ ـ قَالَ أَخْبَرَنَا مُحَمَّدُ بْنُ أَبِي حَفْصَةَ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانُوا يَصُومُونَ عَاشُورَاءَ قَبْلَ أَنْ يُفْرَضَ رَمَضَانُ، وَكَانَ يَوْمًا تُسْتَرُ فِيهِ الْكَعْبَةُ، فَلَمَّا فَرَضَ اللَّهُ رَمَضَانَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ شَاءَ أَنْ يَصُومَهُ فَلْيَصُمْهُ، وَمَنْ شَاءَ أَنْ يَتْرُكَهُ فَلْيَتْرُكْهُ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1592
In-book reference : Book 25, Hadith 78
USC-MSA web (English) reference : Vol. 2, Book 26, Hadith 662
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Sunan Abi Dawud 2425

Narrated AbuQatadah:

A man came to the Prophet (saws) and said: How do you fast, Messenger of Allah? The Messenger of Allah (saws) became angry at what he said.

When Umar observed this (his anger), he said: We are satisfied with Allah as Lord, with Islam as religion, and with Muhammad as Prophet. We seek refuge in Allah from the anger of Allah, and from the anger of His Apostle. Umar continued to repeat these words till his anger cooled down. He then asked: Messenger of Allah, what is the position of one who observes a perpetual fast?

He replied: May he not fast or break his fast. Musaddad said in his version: He has neither fasted nor broken his fast. The narrator, Ghaylan, doubted the actual wordings.

He asked: What is the position of one who fasts two days and does not fast one day?

He said: Is anyone able to do that? He asked: What is the position of one who fasts every second day (i.e. fasts one day and does not fasts the next day)?

He (the Prophet) said: This is the fast that David observed.

He asked: Messenger of Allah, what is the position of one who fasts one day and breaks it for two days? He replied: I wish I were given the power to observe that. Then the Messenger of Allah (saws) said: The observance of three days' fast every month and of one Ramadan to the other (i.e. the fast of Ramadan every year) is (equivalent to) a perpetual fast. I seek from Allah that fasting on the day of Arafah may atone for the sins of the preceding and the coming year, and I seek from Allah that fasting on the day of Ashura' may atone for the sins of the preceding year.

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، وَمُسَدَّدٌ، قَالاَ حَدَّثَنَا حَمَّادُ بْنُ زَيْدٍ، عَنْ غَيْلاَنَ بْنِ جَرِيرٍ، عَنْ عَبْدِ اللَّهِ بْنِ مَعْبَدٍ الزِّمَّانِيِّ، عَنْ أَبِي قَتَادَةَ، أَنَّ رَجُلاً، أَتَى النَّبِيَّ صلى الله عليه وسلم فَقَالَ يَا رَسُولَ اللَّهِ كَيْفَ تَصُومُ فَغَضِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم مِنْ قَوْلِهِ فَلَمَّا رَأَى ذَلِكَ عُمَرُ قَالَ رَضِينَا بِاللَّهِ رَبًّا وَبِالإِسْلاَمِ دِينًا وَبِمُحَمَّدٍ نَبِيًّا نَعُوذُ بِاللَّهِ مِنْ غَضَبِ اللَّهِ وَمِنْ غَضَبِ رَسُولِهِ ‏.‏ فَلَمْ يَزَلْ عُمَرُ يُرَدِّدُهَا حَتَّى سَكَنَ غَضَبُ رَسُولِ اللَّهِ صلى الله عليه وسلم ‏.‏ فَقَالَ يَا رَسُولَ اللَّهِ كَيْفَ بِمَنْ يَصُومُ الدَّهْرَ كُلَّهُ قَالَ ‏"‏ لاَ صَامَ وَلاَ أَفْطَرَ ‏"‏ ‏.‏ قَالَ مُسَدَّدٌ ‏"‏ لَمْ يَصُمْ وَلَمْ يُفْطِرْ أَوْ مَا صَامَ وَلاَ أَفْطَرَ ‏"‏ ‏.‏ شَكَّ غَيْلاَنُ ‏.‏ قَالَ يَا رَسُولَ اللَّهِ كَيْفَ بِمَنْ يَصُومُ يَوْمَيْنِ وَيُفْطِرُ يَوْمًا قَالَ ‏"‏ أَوَيُطِيقُ ذَلِكَ أَحَدٌ ‏"‏ ‏.‏ قَالَ يَا رَسُولَ اللَّهِ فَكَيْفَ بِمَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمًا قَالَ ‏"‏ ذَلِكَ صَوْمُ دَاوُدَ ‏"‏ ‏.‏ قَالَ يَا رَسُولَ اللَّهِ فَكَيْفَ بِمَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمَيْنِ قَالَ ‏"‏ وَدِدْتُ أَنِّي طُوِّقْتُ ذَلِكَ ‏"‏ ‏.‏ ثُمَّ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ ثَلاَثٌ مِنْ كُلِّ شَهْرٍ وَرَمَضَانُ إِلَى رَمَضَانَ فَهَذَا صِيَامُ الدَّهْرِ كُلِّهِ ...
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2425
In-book reference : Book 14, Hadith 113
English translation : Book 13, Hadith 2419
Al-Hakim transmitted on the authority of Abu Hurairah, “Whoever breaks his fast during Ramadan due to forgetfulness is not to make up for the day later or perform an expiation.” It is a sound hadith.
وَلِلْحَاكِمِ: { مَنْ أَفْطَرَ فِي رَمَضَانَ نَاسِيًا فَلَا قَضَاءَ عَلَيْهِ وَلَا كَفَّارَةَ } وَهُوَ صَحِيحٌ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 21
English translation : Book 5, Hadith 691
Arabic reference : Book 5, Hadith 670
Sunan Ibn Majah 1715
It was narrated from Thawban, the freed slave of the Messenger of Allah (saw), that the Messenger of Allah (saw) said:
Whoever fasts six days after the Fitr will have completed the year, for whoever does a good deed will have the reward of ten like it.”
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا بَقِيَّةُ، حَدَّثَنَا صَدَقَةُ بْنُ خَالِدٍ، حَدَّثَنَا يَحْيَى بْنُ الْحَارِثِ الذِّمَارِيُّ، قَالَ سَمِعْتُ أَبَا أَسْمَاءَ الرَّحَبِيَّ، عَنْ ثَوْبَانَ، مَوْلَى رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ عَنْ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ أَنَّهُ قَالَ: ‏"‏ مَنْ صَامَ سِتَّةَ أَيَّامٍ بَعْدَ الْفِطْرِ كَانَ تَمَامَ السَّنَةِ ‏{مَنْ جَاءَ بِالْحَسَنَةِ فَلَهُ عَشْرُ أَمْثَالِهَا}‏ ‏"‏ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 1715
In-book reference : Book 7, Hadith 78
English translation : Vol. 1, Book 7, Hadith 1715
Sunan Abi Dawud 2339
Narrated Rib'i b. Hirash:
On the authority of a man from the Companions of the Prophet (saws): People differed among themselves on the last day of Ramadan (about the appearance of the moon of Shawwal). Then two bedouins came and witnessed before the Prophet (saws) swearing by Allah that they had sighted moon the previous evening. So the Messenger of Allah (saws) commanded the people to break the fast. The narrator Khalaf has added in his version: "and that they should proceed to the place of prayer (for 'Id)".
حَدَّثَنَا مُسَدَّدٌ، وَخَلَفُ بْنُ هِشَامٍ الْمُقْرِئُ، قَالاَ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ مَنْصُورٍ، عَنْ رِبْعِيِّ بْنِ حِرَاشٍ، عَنْ رَجُلٍ، مِنْ أَصْحَابِ النَّبِيِّ صلى الله عليه وسلم قَالَ اخْتَلَفَ النَّاسُ فِي آخِرِ يَوْمٍ مِنْ رَمَضَانَ فَقَدِمَ أَعْرَابِيَّانِ فَشَهِدَا عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم بِاللَّهِ لأَهَلاَّ الْهِلاَلَ أَمْسِ عَشِيَّةً فَأَمَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم النَّاسَ أَنْ يُفْطِرُوا زَادَ خَلَفٌ فِي حَدِيثِهِ وَأَنْ يَغْدُوا إِلَى مُصَلاَّهُمْ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2339
In-book reference : Book 14, Hadith 27
English translation : Book 13, Hadith 2332
Sahih al-Bukhari 2002

Narrated Aisha:

Quraish used to fast on the day of 'Ashura' in the Pre-Islamic period, and Allah's Apostle too, used to fast on that day. When he came to Medina, he fasted on that day and ordered others to fast, too. Later when the fasting of the month of Ramadan was prescribed, he gave up fasting on the day of 'Ashura' and it became optional for one to fast on it or not.

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانَ يَوْمُ عَاشُورَاءَ تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ، وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُهُ، فَلَمَّا قَدِمَ الْمَدِينَةَ صَامَهُ، وَأَمَرَ بِصِيَامِهِ، فَلَمَّا فُرِضَ رَمَضَانُ تَرَكَ يَوْمَ عَاشُورَاءَ، فَمَنْ شَاءَ صَامَهُ، وَمَنْ شَاءَ تَرَكَهُ‏.‏
Reference : Sahih al-Bukhari 2002
In-book reference : Book 30, Hadith 107
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 220
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Yahya related to me from Malik from Yahya ibn Said that he heard Said ibn al Musayyab being asked about making up days missed in Ramadan, and Said said, "What I like best is for days missed in Ramadan to be made up consecutively, and not separately."

Yahya said that he had heard Malik say, about some one who made up the days he had missed in Ramadan separately, that he did not have to repeat them. (What he had done) was enough for him. It was, however, preferable, if he did them consecutively.

Malik said, "Whoever eats or drinks thoughtlessly or forgetfully in Ramadan or during any other obligatory fast that he must do, has to fast another day in its place."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، أَنَّهُ سَمِعَ سَعِيدَ بْنَ الْمُسَيَّبِ، يُسْأَلُ عَنْ قَضَاءِ، رَمَضَانَ فَقَالَ سَعِيدٌ أَحَبُّ إِلَىَّ أَنْ لاَ يُفَرَّقَ قَضَاءُ رَمَضَانَ وَأَنْ يُوَاتَرَ ‏.‏ قَالَ يَحْيَى سَمِعْتُ مَالِكًا يَقُولُ فِيمَنْ فَرَّقَ قَضَاءَ رَمَضَانَ فَلَيْسَ عَلَيْهِ إِعَادَةٌ وَذَلِكَ مُجْزِئٌ عَنْهُ وَأَحَبُّ ذَلِكَ إِلَىَّ أَنْ يُتَابِعَهُ ‏.‏ قَالَ مَالِكٌ مَنْ أَكَلَ أَوْ شَرِبَ فِي رَمَضَانَ سَاهِيًا أَوْ نَاسِيًا أَوْ مَا كَانَ مِنْ صِيَامٍ وَاجِبٍ عَلَيْهِ أَنَّ عَلَيْهِ قَضَاءَ يَوْمٍ مَكَانَهُ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 48
Arabic reference : Book 18, Hadith 681
Sahih al-Bukhari 4502

Narrated `Aisha:

The people used to fast on the day of 'Ashura' before fasting in Ramadan was prescribed but when (the order of compulsory fasting in) Ramadan was revealed, it was up to one to fast on it (i.e. 'Ashura') or not.

حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مُحَمَّدٍ، حَدَّثَنَا ابْنُ عُيَيْنَةَ، عَنِ الزُّهْرِيِّ، عَنْ عُرْوَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ كَانَ عَاشُورَاءُ يُصَامُ قَبْلَ رَمَضَانَ، فَلَمَّا نَزَلَ رَمَضَانُ قَالَ ‏ "‏ مَنْ شَاءَ صَامَ، وَمَنْ شَاءَ أَفْطَرَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 4502
In-book reference : Book 65, Hadith 29
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 29
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Yahya related to me from Malik that he had heard that the people of knowledge did not disapprove of people fasting using tooth-sticks at any hour of the day in Ramadan, whether at the beginning or the end, nor had he heard any of the people of knowledge disapproving of or forbidding the practice.

Yahya said that he heard Malik say, about fasting for six days after breaking the fast at the end of Ramadan, that he had never seen any of the people of knowledge and fiqh fasting them. He said, "I have not heard that any of our predecessors used to do that, and the people of knowledge disapprove of it and they are afraid that it might become a bida and that common and ignorant people might join to Ramadan what does not belong to it, if they were to think that the people of knowledge had given permission for that to be done and were seen doing it.

Yahya said that he heard Malik say, "I have never heard any of the people of knowledge and fiqh and those whom people take as an example forbidding fasting on the day of jumua. Fasting on it is good, and I have seen one of the people of knowledge fasting it, and it seemed to me that he was keen to do so."

USC-MSA web (English) reference : Book 18, Hadith 60
Sahih al-Bukhari 1952

Narrated `Aisha:

Allah's Apostle said, "Whoever died and he ought to have fasted (the missed days of Ramadan) then his guardians must fast on his behalf."

حَدَّثَنَا مُحَمَّدُ بْنُ خَالِدٍ، حَدَّثَنَا مُحَمَّدُ بْنُ مُوسَى بْنِ أَعْيَنَ، حَدَّثَنَا أَبِي، عَنْ عَمْرِو بْنِ الْحَارِثِ، عَنْ عُبَيْدِ اللَّهِ بْنِ أَبِي جَعْفَرٍ، أَنَّ مُحَمَّدَ بْنَ جَعْفَرٍ، حَدَّثَهُ عَنْ عُرْوَةَ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ مَاتَ وَعَلَيْهِ صِيَامٌ صَامَ عَنْهُ وَلِيُّهُ ‏"‏‏.‏ تَابَعَهُ ابْنُ وَهْبٍ عَنْ عَمْرٍو‏.‏ وَرَوَاهُ يَحْيَى بْنُ أَيُّوبَ عَنِ ابْنِ أَبِي جَعْفَرٍ‏.‏
Reference : Sahih al-Bukhari 1952
In-book reference : Book 30, Hadith 59
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 173
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Jami` at-Tirmidhi 723
Abu Hurairah narrated that :
the Messenger of Allah said: "Whoever breaks the fast during Ramadan without an allowance or illness, then if he fasted for all time, his fasting would not make up for it."
حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، وَعَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ، قَالاَ حَدَّثَنَا سُفْيَانُ، عَنْ حَبِيبِ بْنِ أَبِي ثَابِتٍ، حَدَّثَنَا أَبُو الْمُطَوِّسِ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ أَفْطَرَ يَوْمًا مِنْ رَمَضَانَ مِنْ غَيْرِ رُخْصَةٍ وَلاَ مَرَضٍ لَمْ يَقْضِ عَنْهُ صَوْمُ الدَّهْرِ كُلِّهِ وَإِنْ صَامَهُ ‏"‏ ‏.‏ قَالَ أَبُو عِيسَى حَدِيثُ أَبِي هُرَيْرَةَ لاَ نَعْرِفُهُ إِلاَّ مِنْ هَذَا الْوَجْهِ ‏.‏ وَسَمِعْتُ مُحَمَّدًا يَقُولُ أَبُو الْمُطَوِّسِ اسْمُهُ يَزِيدُ بْنُ الْمُطَوِّسِ وَلاَ أَعْرِفُ لَهُ غَيْرَ هَذَا الْحَدِيثِ ‏.‏
Grade: Da'if (Darussalam)
Reference : Jami` at-Tirmidhi 723
In-book reference : Book 8, Hadith 42
English translation : Vol. 2, Book 3, Hadith 723
Mishkat al-Masabih 2044
Abu Qatada said that when a man came to the Prophet and asked him how he fasted, he was angry at what he said, and when 'Umar observed his anger he said, “We are satisfied with God as Lord, with Islam as religion and with Muhammad as Prophet. We seek refuge in God from the anger of God and His messenger.” ‘Umar kept on repeating these words till his anger calmed down, then asked, “Messenger of God, what is the position of one who observes a perpetual fast?” He replied, “May he not fast or break his fast!” or he said, “He has neither fasted nor broken his fast.” He asked, “What is the position of one who fasts two days out of every three?” and received the reply, “Is anyone able to do that?” He asked what was the position of one who fasted every second day and was told that was the fast David observed. He asked what was the position of one who fasted one day out of every three, and God’s messenger replied, “I wish I were given power to observe that.” Thereafter he said, “The observance of three daysfast every month and of Ramadan every year is a perpetual fast. I seek from God that fasting on the day of ‘Arafa may atone for the sins of the preceding and the coming year, and I seek from God that fasting on the day of ‘Ashura’ may atone for the sins of the preceding year.” Muslim transmitted it.
وَعَنْ أَبِي قَتَادَةَ: أَنَّ رَجُلًا أَتَى النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ كَيْفَ تَصُومُ فَغَضِبَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَنْ قَوْله. فَلَمَّا رأى عمر رَضِي الله عَنْهُم غَضَبَهُ قَالَ رَضِينَا بِاللَّهِ رَبًّا وَبِالْإِسْلَامِ دِينًا وَبِمُحَمَّدٍ نَبِيًّا نَعُوذُ بِاللَّهِ مِنْ غَضَبِ اللَّهِ وَغَضب رَسُوله فَجعل عمر رَضِي الله عَنْهُم يُرَدِّدُ هَذَا الْكَلَامَ حَتَّى سَكَنَ غَضَبُهُ فَقَالَ عمر يَا رَسُول الله كَيفَ بِمن يَصُومُ الدَّهْرَ كُلَّهُ قَالَ: «لَا صَامَ وَلَا أَفْطَرَ» . أَوْ قَالَ: «لَمْ يَصُمْ وَلَمْ يُفْطِرْ» . قَالَ كَيْفَ مَنْ يَصُومُ يَوْمَيْنِ وَيُفْطِرُ يَوْمًا قَالَ: «وَيُطِيقُ ذَلِكَ أَحَدٌ» . قَالَ كَيْفَ مَنْ يَصُوم يَوْمًا وَيفْطر يَوْمًا قَالَ: «ذَاك صَوْم دَاوُد عَلَيْهِ السَّلَام» قَالَ كَيْفَ مَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمَيْنِ قَالَ: «وَدِدْتُ أَنِّي طُوِّقْتُ ذَلِكَ» . ثُمَّ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «ثَلَاث مِنْ كُلِّ شَهْرٍ وَرَمَضَانُ إِلَى رَمَضَانَ فَهَذَا صِيَامُ الدَّهْرِ كُلِّهِ صِيَامُ يَوْمِ عَرَفَةَ أَحْتَسِبُ عَلَى اللَّهِ أَنْ يُكَفِّرَ السَّنَةَ الَّتِي قَبْلَهُ وَالسَّنَةَ الَّتِي بَعْدَهُ وَصِيَامُ يَوْمِ عَاشُورَاءَ أَحْتَسِبُ عَلَى اللَّهِ أَنْ يُكَفِّرَ السَّنَةَ الَّتِي قَبْلَهُ» . رَوَاهُ مُسلم
  صَحِيح   (الألباني) حكم   :
Reference : Mishkat al-Masabih 2044
In-book reference : Book 7, Hadith 87

Yahya related to me from Malik from Hisham ibn Urwa from his father that A'isha, the wife of the Prophet, may Allah bless him and grant him peace, said, "The day of Ashura was a day the Quraysh used to fast in the jahiliyya, and the Messenger of Allah, may Allah bless him and grant him peace, used also to fast it during the jahiliyya. Then when the Messenger of Allah, may Allah bless him and grant him peace, came to Madina he fasted it and ordered that it be fasted. Then Ramadan was made obligatory, and that became the fard instead of Ashura, but whoever wanted to, fasted it, and whoever did not want to, did not fast it."

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم أَنَّهَا قَالَتْ كَانَ يَوْمُ عَاشُورَاءَ يَوْمًا تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُهُ فِي الْجَاهِلِيَّةِ فَلَمَّا قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَدِينَةَ صَامَهُ وَأَمَرَ بِصِيَامِهِ فَلَمَّا فُرِضَ رَمَضَانُ كَانَ هُوَ الْفَرِيضَةَ وَتُرِكَ يَوْمُ عَاشُورَاءَ فَمَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 33
Arabic reference : Book 18, Hadith 667
Sahih Muslim 1162 b

Abu Qatada al-Ansari (Allah be pleased with him) reported that the Messenger of Allah (may peace be upon him) was asked about his fasting. The Messenger of Allah (may peace be upon him) felt annoyed. Thereupon 'Umar (Allah be pleased with him) said:

We are pleased with Allah as the Lord, with Islam as our Code of Life, with Muhammad as the Messenger and with our pledge (to you for willing and cheerful submission) as a (sacred) commitment. He was then asked about perpetual fasting, whereupon he said: He neither fasted nor did he break it, or he did not fast and he did not break it. He was then asked about fasting for two days and breaking one day. He (the Holy Prophet) said: And who has strength enough to do it? He was asked about fasting for a day and breaking for two days, whereupon he said: May Allah bestow upon us strength to do it. He was then asked about fasting for a day and breaking on the other, whereupon he said: That is the fasting of my brother David (peace be upon him). He was then asked about fasting on Monday, whereupon he said: It was the day on which I was born. on which I was commissioned with prophethood or revelation was sent to me, (and he further) said: Three days' fasting every month and of the whole of Ramadan every year is a perpetual fast. He was asked about fasting on the day of 'Arafa (9th of Dhu'I-Hijja), whereupon he said: It expiates the sins of the preceding year and the coming year. He was asked about fasting on the day of 'Ashura (10th of Muharram), whereupon be said: It expiates the sins of the preceding year. (Imam Muslim said that in this hadith there is a) narration of Imam Shu'ba that he was asked about fasting on Monday and Thursday, but we (Imam Muslim) did not mention Thursday for we found it as an error (in reporting).
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَمُحَمَّدُ بْنُ بَشَّارٍ، - وَاللَّفْظُ لاِبْنِ الْمُثَنَّى - قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ غَيْلاَنَ بْنِ جَرِيرٍ، سَمِعَ عَبْدَ اللَّهِ بْنَ مَعْبَدٍ الزِّمَّانِيَّ، عَنْ أَبِي قَتَادَةَ الأَنْصَارِيِّ، رضى الله عنه أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم سُئِلَ عَنْ صَوْمِهِ قَالَ فَغَضِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَقَالَ عُمَرُ رضى الله عنه رَضِينَا بِاللَّهِ رَبًّا وَبِالإِسْلاَمِ دِينًا وَبِمُحَمَّدٍ رَسُولاً وَبِبَيْعَتِنَا بَيْعَةً ‏.‏ قَالَ فَسُئِلَ عَنْ صِيَامِ الدَّهْرِ فَقَالَ ‏"‏ لاَ صَامَ وَلاَ أَفْطَرَ ‏"‏ ‏.‏ أَوْ ‏"‏ مَا صَامَ وَمَا أَفْطَرَ ‏"‏ ‏.‏ قَالَ فَسُئِلَ عَنْ صَوْمِ يَوْمَيْنِ وَإِفْطَارِ يَوْمٍ قَالَ ‏"‏ وَمَنْ يُطِيقُ ذَلِكَ ‏"‏ ‏.‏ قَالَ وَسُئِلَ عَنْ صَوْمِ يَوْمٍ وَإِفْطَارِ يَوْمَيْنِ قَالَ ‏"‏ لَيْتَ أَنَّ اللَّهَ قَوَّانَا لِذَلِكَ ‏"‏ ‏.‏ قَالَ وَسُئِلَ عَنْ صَوْمِ يَوْمٍ وَإِفْطَارِ يَوْمٍ قَالَ ‏"‏ ذَاكَ صَوْمُ أَخِي دَاوُدَ عَلَيْهِ السَّلاَمُ ‏"‏ ‏.‏ قَالَ وَسُئِلَ عَنْ صَوْمِ يَوْمِ الاِثْنَيْنِ قَالَ ‏"‏ ذَاكَ يَوْمٌ وُلِدْتُ فِيهِ وَيَوْمٌ بُعِثْتُ أَوْ أُنْزِلَ عَلَىَّ فِيهِ ‏"‏ ‏.‏ قَالَ فَقَالَ ‏"‏ صَوْمُ ثَلاَثَةٍ مِنْ كُلِّ شَهْرٍ وَرَمَضَانَ إِلَى رَمَضَانَ صَوْمُ الدَّهْرِ ‏"‏ ‏.‏ قَالَ وَسُئِلَ عَنْ صَوْمِ يَوْمِ عَرَفَةَ فَقَالَ ‏"‏ يُكَفِّرُ السَّنَةَ الْمَاضِيَةَ وَالْبَاقِيَةَ ...
Reference : Sahih Muslim 1162b
In-book reference : Book 13, Hadith 253
USC-MSA web (English) reference : Book 6, Hadith 2603
  (deprecated numbering scheme)
Sahih Muslim 1162 a

Abu Qatada reported that a person came to the Apostle of Allah (may peace be upon him) and said:

How do you fast? The Messenger of Allah (may peace be upon him) felt annoyed. When 'Umar (Allah be pleased with him) noticed his annoyance, he said: We are well pleased with Allah as our Lord, with Islam as our code of life, and with Muhammad as our Prophet. We seek refuge with Allah from the anger of Allah and that of His Messenger. 'Umar kept on repeating these words till his (the Prophet's) anger calmed down. Then Umar said: Messenger of Allah, what is the position of one who fasts perpetually? He (saws) said: He neither fasted nor broke it, or he said: He did not fast and he did not break it. 'Umar said: What about him who fasts for two days and does not fast one day? He (saws) said: Is anyone capable of doing that? He ('Umar) said: What is the position of him who fasts for a day and doesn't fast on the other day? Thereupon he (the Holy Prophet) said: That is the fast of David (peace be upon him). He ('Umar) said: What about him who fasts one day and doesn't fast for two days. Thereupon he (the Messenger of Allah) said: I wish I were given the strength to do that. Thereafter he (saws) said: Fasting three days every month and that of Ramadan every year is a perpetual fasting. I seek from Allah that fasting on the day of 'Arafa may atone for the sins of the preceding and the coming years, and I seek from Allah that fasting on the day of Ashura may atone for the sins of the preceding year.
وَحَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِيُّ، وَقُتَيْبَةُ بْنُ سَعِيدٍ، جَمِيعًا عَنْ حَمَّادٍ، - قَالَ يَحْيَى أَخْبَرَنَا حَمَّادُ بْنُ زَيْدٍ، - عَنْ غَيْلاَنَ، عَنْ عَبْدِ اللَّهِ بْنِ مَعْبَدٍ الزِّمَّانِيِّ، عَنْ أَبِي قَتَادَةَ، رَجُلٌ أَتَى النَّبِيَّ صلى الله عليه وسلم فَقَالَ كَيْفَ تَصُومُ فَغَضِبَ رَسُولُ اللَّهِ صلى الله عليه وسلم فَلَمَّا رَأَى عُمَرُ - رضى الله عنه - غَضَبَهُ قَالَ رَضِينَا بِاللَّهِ رَبًّا وَبِالإِسْلاَمِ دِينًا وَبِمُحَمَّدٍ نَبِيًّا نَعُوذُ بِاللَّهِ مِنْ غَضَبِ اللَّهِ وَغَضَبِ رَسُولِهِ ‏.‏ فَجَعَلَ عُمَرُ - رضى الله عنه - يُرَدِّدُ هَذَا الْكَلاَمَ حَتَّى سَكَنَ غَضَبُهُ فَقَالَ عُمَرُ يَا رَسُولَ اللَّهِ كَيْفَ بِمَنْ يَصُومُ الدَّهْرَ كُلَّهُ قَالَ ‏"‏ لاَ صَامَ وَلاَ أَفْطَرَ - أَوْ قَالَ - لَمْ يَصُمْ وَلَمْ يُفْطِرْ ‏"‏ ‏.‏ قَالَ كَيْفَ مَنْ يَصُومُ يَوْمَيْنِ وَيُفْطِرُ يَوْمًا قَالَ ‏"‏ وَيُطِيقُ ذَلِكَ أَحَدٌ ‏"‏ ‏.‏ قَالَ كَيْفَ مَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمًا قَالَ ‏"‏ ذَاكَ صَوْمُ دَاوُدَ عَلَيْهِ السَّلاَمُ ‏"‏ ‏.‏ قَالَ كَيْفَ مَنْ يَصُومُ يَوْمًا وَيُفْطِرُ يَوْمَيْنِ قَالَ ‏"‏ وَدِدْتُ أَنِّي طُوِّقْتُ ذَلِكَ ‏"‏ ‏.‏ ثُمَّ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ ثَلاَثٌ مِنْ كُلِّ شَهْرٍ وَرَمَضَانُ إِلَى رَمَضَانَ فَهَذَا صِيَامُ الدَّهْرِ كُلِّهِ صِيَامُ يَوْمِ عَرَفَةَ أَحْتَسِبُ عَلَى اللَّهِ أَنْ يُكَفِّرَ السَّنَةَ الَّتِي قَبْلَهُ وَالسَّنَةَ الَّتِي ...
Reference : Sahih Muslim 1162a
In-book reference : Book 13, Hadith 252
USC-MSA web (English) reference : Book 6, Hadith 2602
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Sunan Ibn Majah 1647
It was narrated from Qasim Abu ‘Abdur-Rahman that he heard Mu’awiyah bin Abu Sufyan on the pulpit saying:
“The Messenger of Allah (saw) used to say from the pulpit, before the month of Ramadan: ‘Fasting will begin on such and such a day, but we are going to start fasting earlier, so whoever wants to start fasting earlier (i.e., in Sha’ban), let him do so, and whoever wants to wait until Ramadan begins, let him do so.’”
حَدَّثَنَا الْعَبَّاسُ بْنُ الْوَلِيدِ الدِّمَشْقِيُّ، حَدَّثَنَا مَرْوَانُ بْنُ مُحَمَّدٍ، حَدَّثَنَا الْهَيْثَمُ بْنُ حُمَيْدٍ، حَدَّثَنَا الْعَلاَءُ بْنُ الْحَارِثِ، عَنِ الْقَاسِمِ أَبِي عَبْدِ الرَّحْمَنِ، أَنَّهُ سَمِعَ مُعَاوِيَةَ بْنَ أَبِي سُفْيَانَ، عَلَى الْمِنْبَرِ يَقُولُ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ عَلَى الْمِنْبَرِ قَبْلَ شَهْرِ رَمَضَانَ ‏ "‏ الصِّيَامُ يَوْمَ كَذَا وَكَذَا وَنَحْنُ مُتَقَدِّمُونَ فَمَنْ شَاءَ فَلْيَتَقَدَّمْ وَمَنْ شَاءَ فَلْيَتَأَخَّرْ ‏"‏ ‏.‏
Grade: Da’if (Darussalam)
Reference : Sunan Ibn Majah 1647
In-book reference : Book 7, Hadith 10
English translation : Vol. 1, Book 7, Hadith 1647
Sahih al-Bukhari 4503

Narrated `Abdullah:

That Al-Ash'ath entered upon him while he was eating. Al-Ash'ath said, "Today is 'Ashura." I said (to him), "Fasting had been observed (on such a day) before (the order of compulsory fasting in) Ramadan was revealed. But when (the order of fasting in) Ramadan was revealed, fasting (on 'Ashura') was given up, so come and eat."

حَدَّثَنِي مَحْمُودٌ، أَخْبَرَنَا عُبَيْدُ اللَّهِ، عَنْ إِسْرَائِيلَ، عَنْ مَنْصُورٍ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، عَنْ عَبْدِ اللَّهِ، قَالَ دَخَلَ عَلَيْهِ الأَشْعَثُ وَهْوَ يَطْعَمُ فَقَالَ الْيَوْمُ عَاشُورَاءُ‏.‏ فَقَالَ كَانَ يُصَامُ قَبْلَ أَنْ يَنْزِلَ رَمَضَانُ، فَلَمَّا نَزَلَ رَمَضَانُ تُرِكَ، فَادْنُ فَكُلْ‏.‏
Reference : Sahih al-Bukhari 4503
In-book reference : Book 65, Hadith 30
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 30
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Sahih Muslim 1080 f

'Abdullah b. 'Umar (Allah be pleased with both of them) reported Allah's Messenger (may peace be upon him) as saying:

The month (of Ramadan) may consist of twenty nine days; so when you see the new moon observe fast and when you see (the new moon again at the commencement of the month of Shawwal) then break It, and if the sky is cloudy for you, then calculate it (and complete thirty days).
وَحَدَّثَنِي حُمَيْدُ بْنُ مَسْعَدَةَ الْبَاهِلِيُّ، حَدَّثَنَا بِشْرُ بْنُ الْمُفَضَّلِ، حَدَّثَنَا سَلَمَةُ، - وَهُوَ ابْنُ عَلْقَمَةَ - عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، - رضى الله عنهما - قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ الشَّهْرُ تِسْعٌ وَعِشْرُونَ فَإِذَا رَأَيْتُمُ الْهِلاَلَ فَصُومُوا وَإِذَا رَأَيْتُمُوهُ فَأَفْطِرُوا فَإِنْ غُمَّ عَلَيْكُمْ فَاقْدِرُوا لَهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1080f
In-book reference : Book 13, Hadith 9
USC-MSA web (English) reference : Book 6, Hadith 2368
  (deprecated numbering scheme)
Sunan an-Nasa'i 2184
It was narrated that 'Abdullah bin Shaqiq said:
"I said to Aishah: 'Did the Messenger of Allah offer Duha prayer? She said: "No, unless he was returning from a journey, I Did the Messenger of Allah fast an entire month?' She said: 'No, I do not remember him fasting any month in full apart from Ramadan, and he did not break his fast for a whole month, rather he would fast some of (each month) until he passed away."' '
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ أَنْبَأَنَا خَالِدٌ، - وَهُوَ ابْنُ الْحَارِثِ - عَنْ كَهْمَسٍ، عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ، قَالَ قُلْتُ لِعَائِشَةَ أَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يُصَلِّي صَلاَةَ الضُّحَى قَالَتْ لاَ إِلاَّ أَنْ يَجِيءَ مِنْ مَغِيبِهِ ‏.‏ قُلْتُ هَلْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُ شَهْرًا كُلَّهُ قَالَتْ لاَ مَا عَلِمْتُ صَامَ شَهْرًا كُلَّهُ إِلاَّ رَمَضَانَ وَلاَ أَفْطَرَ حَتَّى يَصُومَ مِنْهُ حَتَّى مَضَى لِسَبِيلِهِ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2184
In-book reference : Book 22, Hadith 95
English translation : Vol. 3, Book 22, Hadith 2186
Sahih al-Bukhari 4501

Narrated Ibn `Umar:

Fasting was observed on the day of 'Ashura' (i.e. 10th of Muharram) by the people of the Pre-lslamic Period. But when (the order of compulsory fasting) in the month of Ramadan was revealed, the Prophet said, "It is up to one to fast on it (i.e. day of 'Ashura') or not."

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، قَالَ أَخْبَرَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كَانَ عَاشُورَاءُ يَصُومُهُ أَهْلُ الْجَاهِلِيَّةِ، فَلَمَّا نَزَلَ رَمَضَانُ قَالَ ‏ "‏ مَنْ شَاءَ صَامَهُ، وَمَنْ شَاءَ لَمْ يَصُمْهُ ‏"‏‏.‏
Reference : Sahih al-Bukhari 4501
In-book reference : Book 65, Hadith 28
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 28
  (deprecated numbering scheme)

Yahya related to me from Malik that Humayd ibn Oays al-Makki told him, "I was with Mujahid while he was performing tawaf around the Kaba, and a man came to him and asked whether the days (of fasting) for kaffara had to be fasted consecutively, or could they be split up. I said to him, 'Yes, they can be split up, if the person so wishes.' Mujahid said, 'He should not split them up, because in Ubayy ibn Kab's recitation they are referred to as three consecutive days.' "

Malik said, "What I like most is what Allah has specified in the Qur'an, that is, that they are fasted consecutively."

Malik was asked about a woman who began the day fasting in Ramadan and though it was outside of the time of her period, fresh blood (i.e. not menstrual blood) flowed from her. She then waited until evening to see the same, but did not see anything.Then, on the next day in the morning she had anotherflow, though less than the first. Then, some days before her period, the flow stopped completely. Malik was asked what she should do about her fasting and prayer, and he said, "This blood is like menstrual blood. When she sees it she should break her fast, and then make up the days she has missed. Then, when the blood has completely stopped, she should do ghusl and fast."

Malik was asked whether someone who became muslim on the last day of Ramadan had to make up all of Ramadan or whether he just had to make up the day when he became muslim, and he said, "He does not have to make up any of the days that have passed. He begins fasting from that day onwards. What I like most is that he makes up the day on which he became muslim."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ حُمَيْدِ بْنِ قَيْسٍ الْمَكِّيِّ، أَنَّهُ أَخْبَرَهُ قَالَ كُنْتُ مَعَ مُجَاهِدٍ وَهُوَ يَطُوفُ بِالْبَيْتِ فَجَاءَهُ إِنْسَانٌ فَسَأَلَهُ عَنْ صِيَامِ أَيَّامِ الْكَفَّارَةِ أَمُتَتَابِعَاتٍ أَمْ يَقْطَعُهَا قَالَ حُمَيْدٌ فَقُلْتُ لَهُ نَعَمْ يَقْطَعُهَا إِنْ شَاءَ ‏.‏ قَالَ مُجَاهِدٌ لاَ يَقْطَعُهَا فَإِنَّهَا فِي قِرَاءَةِ أُبَىِّ بْنِ كَعْبٍ ثَلاَثَةِ أَيَّامٍ مُتَتَابِعَاتٍ ‏.‏ قَالَ مَالِكٌ وَأَحَبُّ إِلَىَّ أَنْ يَكُونَ مَا سَمَّى اللَّهُ فِي الْقُرْآنِ يُصَامُ مُتَتَابِعًا ‏.‏ وَسُئِلَ مَالِكٌ عَنِ الْمَرْأَةِ تُصْبِحُ صَائِمَةً فِي رَمَضَانَ فَتَدْفَعُ دَفْعَةً مِنْ دَمٍ عَبِيطٍ فِي غَيْرِ أَوَانِ حَيْضِهَا ثُمَّ تَنْتَظِرُ حَتَّى تُمْسِيَ أَنْ تَرَى مِثْلَ ذَلِكَ فَلاَ تَرَى شَيْئًا ثُمَّ تُصْبِحُ يَوْمًا آخَرَ فَتَدْفَعُ دَفْعَةً أُخْرَى وَهِيَ دُونَ الأُولَى ثُمَّ يَنْقَطِعُ ذَلِكَ عَنْهَا قَبْلَ حَيْضَتِهَا بِأَيَّامٍ فَسُئِلَ مَالِكٌ كَيْفَ تَصْنَعُ فِي صِيَامِهَا وَصَلاَتِهَا قَالَ مَالِكٌ ذَلِكَ الدَّمُ مِنَ الْحَيْضَةِ فَإِذَا رَأَتْهُ فَلْتُفْطِرْ وَلْتَقْضِ مَا أَفْطَرَتْ فَإِذَا ذَهَبَ عَنْهَا الدَّمُ فَلْتَغْتَسِلْ وَتَصُومُ ‏.‏ وَسُئِلَ عَمَّنْ أَسْلَمَ فِي آخِرِ يَوْمٍ مِنْ رَمَضَانَ هَلْ عَلَيْهِ قَضَاءُ رَمَضَانَ كُلِّهِ أَوْ يَجِبُ عَلَيْهِ قَضَاءُ الْيَوْمِ الَّذِي أَسْلَمَ فِيهِ فَقَالَ لَيْسَ عَلَيْهِ قَضَاءُ مَا مَضَى وَإِنَّمَا يَسْتَأْنِفُ الصِّيَامَ ...
USC-MSA web (English) reference : Book 18, Hadith 49
Arabic reference : Book 18, Hadith 682
Sunan Ibn Majah 1731
It was narrated that Qatadah bin Nu’man said:
“I heard the Messenger of Allah (saw) say: ‘Whoever fasts the Day of ‘Arafah, his sins of the previous and following year will be forgiven.’”
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا يَحْيَى بْنُ حَمْزَةَ، عَنْ إِسْحَاقَ بْنِ عَبْدِ اللَّهِ، عَنْ عِيَاضِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، عَنْ قَتَادَةَ بْنِ النُّعْمَانِ، قَالَ: سَمِعْتُ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ يَقُولُ: ‏ "‏ مَنْ صَامَ يَوْمَ عَرَفَةَ، غُفِرَ لَهُ سَنَةٌ أَمَامَهُ وَسَنَةٌ بَعْدَهُ ‏"‏ ‏.‏
Grade: Da’if (Darussalam)
Reference : Sunan Ibn Majah 1731
In-book reference : Book 7, Hadith 94
English translation : Vol. 1, Book 7, Hadith 1731
Sunan Ibn Majah 2768
It was narrated that Ubayy bin Ka’b said:
“The Messenger of Allah (saw) said: ‘For guarding the frontier for a day in the cause of Allah, defending the Muslims, seeking reward, apart from in the month of Ramadan, there is a reward granted greater than worshipping for a hundred years, fasting and praying. Guarding the frontier for a day in the cause of Allah, defending the Muslims, seeking reward, in the month of Ramadan, is better before Allah and brings a greater reward” – I think he said – “than worshipping for a thousand years, fasting and praying. If Allah returns him to his family safe and sound, no bad deed will be recorded for him for a thousand years, but his good deeds will be recorded, and the reward for guarding the frontier will come to him until the Day of Resurrection.”
حَدَّثَنَا مُحَمَّدُ بْنُ إِسْمَاعِيلَ بْنِ سَمُرَةَ، حَدَّثَنَا مُحَمَّدُ بْنُ يَعْلَى السُّلَمِيُّ، حَدَّثَنَا عُمَرُ بْنُ صُبْحٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَمْرٍو، عَنْ مَكْحُولٍ، عَنْ أُبَىِّ بْنِ كَعْبٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لَرِبَاطُ يَوْمٍ فِي سَبِيلِ اللَّهِ مِنْ وَرَاءِ عَوْرَةِ الْمُسْلِمِينَ مُحْتَسِبًا مِنْ غَيْرِ شَهْرِ رَمَضَانَ أَعْظَمُ أَجْرًا مِنْ عِبَادَةِ مِائَةِ سَنَةٍ صِيَامِهَا وَقِيَامِهَا وَرِبَاطُ يَوْمٍ فِي سَبِيلِ اللَّهِ مِنْ وَرَاءِ عَوْرَةِ الْمُسْلِمِينَ مُحْتَسِبًا مِنْ شَهْرِ رَمَضَانَ أَفْضَلُ عِنْدَ اللَّهِ وَأَعْظَمُ أَجْرًا - أُرَاهُ قَالَ - مِنْ عِبَادَةِ أَلْفِ سَنَةٍ صِيَامِهَا وَقِيَامِهَا فَإِنْ رَدَّهُ اللَّهُ إِلَى أَهْلِهِ سَالِمًا لَمْ تُكْتَبْ عَلَيْهِ سَيِّئَةٌ أَلْفَ سَنَةٍ وَتُكْتَبُ لَهُ الْحَسَنَاتُ وَيُجْرَى لَهُ أَجْرُ الرِّبَاطِ إِلَى يَوْمِ الْقِيَامَةَ ‏"‏ ‏.‏
Grade: Maudu’ (Darussalam)
Reference : Sunan Ibn Majah 2768
In-book reference : Book 24, Hadith 16
English translation : Vol. 4, Book 24, Hadith 2768
Sahih Muslim 1113 a

Ibn Abbas (Allah be pleased with him) reported that the Messenger of Allah (may peace be upon him) went out during the month of Ramadan in the year of Victory (when Mecca was conquered) and was fasting till he reached Kadid (a canal situated at a distance of forty-two miles from Mecca) and he then broke the fast. And it was the habit of the Companions of the Messenger of Allah (may peace be upon him) to follow him in every new thing (or act). So they followed him also (in this matter).

حَدَّثَنِي يَحْيَى بْنُ يَحْيَى، وَمُحَمَّدُ بْنُ رُمْحٍ، قَالاَ أَخْبَرَنَا اللَّيْثُ، ح وَحَدَّثَنَا قُتَيْبَةُ بْنُ، سَعِيدٍ حَدَّثَنَا لَيْثٌ، عَنِ ابْنِ شِهَابٍ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ بْنِ عُتْبَةَ، عَنِ ابْنِ عَبَّاسٍ، - رضى الله عنهما - أَنَّهُ أَخْبَرَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم خَرَجَ عَامَ الْفَتْحِ فِي رَمَضَانَ فَصَامَ حَتَّى بَلَغَ الْكَدِيدَ ثُمَّ أَفْطَرَ وَكَانَ صَحَابَةُ رَسُولِ اللَّهِ صلى الله عليه وسلم يَتَّبِعُونَ الأَحْدَثَ فَالأَحْدَثَ مِنْ أَمْرِهِ ‏.‏
Reference : Sahih Muslim 1113a
In-book reference : Book 13, Hadith 110
USC-MSA web (English) reference : Book 6, Hadith 2466
  (deprecated numbering scheme)

Yahya related to me from Malik from Hisham ibn Urwa that his father used to be cupped while he was fasting and he would not then break his fast. Hisham added, "I only ever saw him being cupped when he was fasting."

Malik said, "Cupping is only disapproved of for some one who is fasting out of fear that he will become weak and if it were not for that, it would not be disapproved of. I do not think that a man who is cupped in Ramadan and does not break his fast, owes anything, and I do not say that he has to make up for the day on which he was cupped, because cupping is only disapproved of for someone fasting if his fast is endangered. I do not think that someone who is cupped, and is then well enough to keep the fast until evening, owes anything, nor does he have to make up for that day."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّهُ كَانَ يَحْتَجِمُ وَهُوَ صَائِمٌ ثُمَّ لاَ يُفْطِرُ ‏.‏ قَالَ وَمَا رَأَيْتُهُ احْتَجَمَ قَطُّ إِلاَّ وَهُوَ صَائِمٌ ‏.‏ قَالَ مَالِكٌ لاَ تُكْرَهُ الْحِجَامَةُ لِلصَّائِمِ إِلاَّ خَشْيَةً مِنْ أَنْ يَضْعُفَ وَلَوْلاَ ذَلِكَ لَمْ تُكْرَهْ وَلَوْ أَنَّ رَجُلاً احْتَجَمَ فِي رَمَضَانَ ثُمَّ سَلِمَ مِنْ أَنْ يُفْطِرَ لَمْ أَرَ عَلَيْهِ شَيْئًا وَلَمْ آمُرْهُ بِالْقَضَاءِ لِذَلِكَ الْيَوْمِ الَّذِي احْتَجَمَ فِيهِ لأَنَّ الْحِجَامَةَ إِنَّمَا تُكْرَهُ لِلصَّائِمِ لِمَوْضِعِ التَّغْرِيرِ بِالصِّيَامِ فَمَنِ احْتَجَمَ وَسَلِمَ مِنْ أَنْ يُفْطِرَ حَتَّى يُمْسِيَ فَلاَ أَرَى عَلَيْهِ شَيْئًا وَلَيْسَ عَلَيْهِ قَضَاءُ ذَلِكَ الْيَوْمِ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 32
Arabic reference : Book 18, Hadith 666
Sunan an-Nasa'i 2348
It was narrated that 'Aishah said:
"I do not know that the Messenger of Allah recited the whole Quran in one night, or prayed Qiyam until morning, or ever fasted an entire month, except Ramadan."
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، عَنْ خَالِدٍ، قَالَ حَدَّثَنَا سَعِيدٌ، قَالَ حَدَّثَنَا قَتَادَةُ، عَنْ زُرَارَةَ بْنِ أَوْفَى، عَنْ سَعْدِ بْنِ هِشَامٍ، عَنْ عَائِشَةَ، قَالَتْ لاَ أَعْلَمُ نَبِيَّ اللَّهِ صلى الله عليه وسلم قَرَأَ الْقُرْآنَ كُلَّهُ فِي لَيْلَةٍ وَلاَ قَامَ لَيْلَةً حَتَّى الصَّبَاحِ وَلاَ صَامَ شَهْرًا قَطُّ كَامِلاً غَيْرَ رَمَضَانَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2348
In-book reference : Book 22, Hadith 259
English translation : Vol. 3, Book 22, Hadith 2350
Sunan an-Nasa'i 2182
It was narrated that Aishah said:
"I do not know that the Messenger of Allah recited the whole Quran in one night, or prayed Qiyam until morning, or ever fasted an entire month except Ramadan." '
أَخْبَرَنَا هَارُونُ بْنُ إِسْحَاقَ، عَنْ عَبْدَةَ، عَنْ سَعِيدٍ، عَنْ قَتَادَةَ، عَنْ زُرَارَةَ بْنِ أَوْفَى، عَنْ سَعْدِ بْنِ هِشَامٍ، عَنْ عَائِشَةَ، قَالَتْ لاَ أَعْلَمُ رَسُولَ اللَّهِ صلى الله عليه وسلم قَرَأَ الْقُرْآنَ كُلَّهُ فِي لَيْلَةٍ وَلاَ قَامَ لَيْلَةً حَتَّى الصَّبَاحِ وَلاَ صَامَ شَهْرًا كَامِلاً قَطُّ غَيْرَ رَمَضَانَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2182
In-book reference : Book 22, Hadith 93
English translation : Vol. 3, Book 22, Hadith 2184
Riyad as-Salihin 1248
Reported Mujibah Al-Bahiliyah on the authority of her father or uncle that he visited the Messenger of Allah (PBUH) once and then went to see him again after a year. His appearance had totally changed. He asked the Messenger of Allah (PBUH) if he had recognized him. The Messenger of Allah (PBUH) asked, "Who are you?" He replied:
"I am Al- Bahili who visited you last year." The Messenger of Allah (PBUH) said, "You were quite handsome, what has changed your appearance so much?" He replied, "Since my departure from here, I have not eaten anything except at night." The Messenger of Allah (PBUH) remarked, "You have put yourself to torture. Observe Saum (fasting) during the Month of Patience (i.e., Ramadan) and fast one day from each month." He submitted, "Permit me to observe more voluntary fasts because I have capacity to do so." The Messenger of Allah (PBUH) said, "Then observe fasts for two days in every month." He said, "Permit me to observe more." The Messenger of Allah (PBUH) said, "Observe fasts on three days in every month." He requested that he should be allowed to observe more fasts. The Messenger of Allah (PBUH) said, "Fast three days during the sacred months and omit fasting for three days alternately." He (PBUH) joined his three fingers together and left them apart while repeating this sentence thrice.

[Abu Dawud].

وعن مجيبة الباهلية عن أبيها أو عمها، أنه أتى رسول الله صلى الله عليه وسلم ثم انطلق فأتاه بعد سنة وقد تغيرت حاله وهيئته، فقال‏:‏ يا رسول الله أما تعرفني‏؟‏ قال‏:‏ ‏"‏ومن أنت‏؟‏‏"‏ قال‏:‏ أنا الباهلي الذي جئتك عام الأول‏.‏ قال‏:‏ ‏"‏فما غيرك، وقد كنت حسن الهيئة‏؟‏‏"‏ قال‏:‏ ما أكلت طعامًا منذ فارقتك إلا بليل‏.‏ فقال رسول الله صلى الله عليه وسلم ‏"‏عذبت نفسك‏!‏‏"‏ ثم قال‏:‏ ‏"‏صم شهر الصبر، ويومًا من كل شهر‏"‏ قال‏:‏ زدني، فإن بي قوة، قال‏:‏ ‏"‏ صم يومين‏"‏ قال‏:‏ زذني، قال‏:‏ ‏"‏صم ثلاثة أيام‏"‏ قال‏:‏ زدني‏.‏ قال‏:‏ ‏"‏صم من الحرم واترك، صم من الحرم واترك، صم من الحرم واترك‏"‏ وقال بأصابعه الثلاث فضمها، ثم أرسلها‏.‏ ‏(‏‏(‏رواه أبو داود‏.‏ ‏)‏‏)‏‏.‏
Reference : Riyad as-Salihin 1248
In-book reference : Book 8, Hadith 258
Sunan Abi Dawud 2428

Narrated Abdullah ibn al-Harith ; or Uncle of Mujibah al-Bahiliyyah:

The father or Uncle of Mujibah al-Bahiliyyah visited the Messenger of Allah (saws). He then went away and came to him (again) after one year when his condition and appearance had changed.

He said: Messenger of Allah, do you not recognize me? He asked: Who are you? He replied: I am al-Bahili who came to you last year. He said: What has changed you? You were looking well, then you were good in appearance? He said: I have only food at night since I departed from you.

Thereupon the Messenger of Allah (saws) said: Why did you torment yourself? Fast during Ramadan (the month of patience) and fast for one day every month. He said: Increase it for me, for I have (more) strength. He said: Fast two days. He again said: Increase it for me. He said: Fast three days. He again said: Increase it for me. He said: Fast during the inviolable months and then stop; fast during the inviolable months and then stop; fast during the inviolable months and then stop. He indicated by his three fingers, and joined them and then opened them.

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا حَمَّادٌ، عَنْ سَعِيدٍ الْجُرَيْرِيِّ، عَنْ أَبِي السَّلِيلِ، عَنْ مُجِيبَةَ الْبَاهِلِيَّةِ، عَنْ أَبِيهَا، أَوْ عَمِّهَا أَنَّهُ أَتَى رَسُولَ اللَّهِ صلى الله عليه وسلم ثُمَّ انْطَلَقَ فَأَتَاهُ بَعْدَ سَنَةٍ وَقَدْ تَغَيَّرَتْ حَالَتُهُ وَهَيْئَتُهُ فَقَالَ يَا رَسُولَ اللَّهِ أَمَا تَعْرِفُنِي قَالَ ‏"‏ وَمَنْ أَنْتَ ‏"‏ ‏.‏ قَالَ أَنَا الْبَاهِلِيُّ الَّذِي جِئْتُكَ عَامَ الأَوَّلِ ‏.‏ قَالَ ‏"‏ فَمَا غَيَّرَكَ وَقَدْ كُنْتَ حَسَنَ الْهَيْئَةِ ‏"‏ ‏.‏ قَالَ مَا أَكَلْتُ طَعَامًا إِلاَّ بِلَيْلٍ مُنْذُ فَارَقْتُكَ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لِمَ عَذَّبْتَ نَفْسَكَ ‏"‏ ‏.‏ ثُمَّ قَالَ ‏"‏ صُمْ شَهْرَ الصَّبْرِ وَيَوْمًا مِنْ كُلِّ شَهْرٍ ‏"‏ ‏.‏ قَالَ زِدْنِي فَإِنَّ بِي قُوَّةً ‏.‏ قَالَ ‏"‏ صُمْ يَوْمَيْنِ ‏"‏ ‏.‏ قَالَ زِدْنِي ‏.‏ قَالَ ‏"‏ صُمْ ثَلاَثَةَ أَيَّامٍ ‏"‏ ‏.‏ قَالَ زِدْنِي ‏.‏ قَالَ ‏"‏ صُمْ مِنَ الْحُرُمِ وَاتْرُكْ صُمْ مِنَ الْحُرُمِ وَاتْرُكْ صُمْ مِنَ الْحُرُمِ وَاتْرُكْ ‏"‏ ‏.‏ وَقَالَ بِأَصَابِعِهِ الثَّلاَثَةِ فَضَمَّهَا ثُمَّ أَرْسَلَهَا ‏.‏
Grade: Da'if (Al-Albani)  ضعيف   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2428
In-book reference : Book 14, Hadith 116
English translation : Book 13, Hadith 2422
Sunan Ibn Majah 1653
It was narrated that ‘Umair bin Anas bin Malik said:
“My paternal uncles among the Ansar who were among the Companions of the Messenger of Allah (saw) told me: ‘The new crescent of Shawwal was covered with clouds, so we fasted the next day. Then some riders came at the end of the day and testified to the Prophet (saw) that they had seen the new crescent the night before. The Messenger of Allah (saw) commanded them to break their fast and to go out to offer the ‘Eid prayer the following morning.’”
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا هُشَيْمٌ، عَنْ أَبِي بِشْرٍ، عَنْ أَبِي عُمَيْرِ بْنِ أَنَسِ بْنِ مَالِكٍ، قَالَ حَدَّثَنِي عُمُومَتِي، مِنَ الأَنْصَارِ مِنْ أَصْحَابِ رَسُولِ اللَّهِ ـ صلى الله عليه وسلم ـ قَالُوا: أُغْمِيَ عَلَيْنَا هِلاَلُ شَوَّالٍ. فَأَصْبَحْنَا صِيَامًا. فَجَاءَ رَكْبٌ مِنْ آخِرِ النَّهَارِ فَشَهِدُوا عِنْدَ النَّبِيِّ ـ صلى الله عليه وسلم ـ أَنَّهُمْ رَأَوُا الْهِلاَلَ بِالأَمْسِ. فَأَمَرَهُمْ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ أَنْ يُفْطِرُوا وَأَنْ يَخْرُجُوا إِلَى عِيدِهِمْ مِنَ الْغَدِ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan Ibn Majah 1653
In-book reference : Book 7, Hadith 16
English translation : Vol. 1, Book 7, Hadith 1653

Malik said, "I have heard people of knowledge saying that the kaffara specified by the Messenger of Allah, may Allah bless him and grant him peace, for a man who has intercourse with his wife during the day in Ramadan is not due from someone who, on a day when he is making up the fast of Ramadan, breaks his fast by having intercourse with his wife, or whatever. He only has to make up for that day."

Malik said, "This is what I like most out of what I have heard about the matter."

USC-MSA web (English) reference : Book 18, Hadith 29
Sunan Abi Dawud 2417
Narrated Abu Sa’id Al Khudri :
The Messenger of Allah (saws) forbade fasting on two days, al-Fitr (breaking the fast of Ramadan) and al-Adha (the day of sacrifice), and wearing a tight single garment the raising of which discloses private parts, and sitting with one's legs drawn up and wrapped in one's garment, and forbade praying at two hours, after the Fajr prayer and after the Asr prayer.
حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا وُهَيْبٌ، حَدَّثَنَا عَمْرُو بْنُ يَحْيَى، عَنْ أَبِيهِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، قَالَ نَهَى رَسُولُ اللَّهِ صلى الله عليه وسلم عَنْ صِيَامِ يَوْمَيْنِ يَوْمِ الْفِطْرِ وَيَوْمِ الأَضْحَى وَعَنْ لِبْسَتَيْنِ الصَّمَّاءِ وَأَنْ يَحْتَبِيَ الرَّجُلُ فِي الثَّوْبِ الْوَاحِدِ وَعَنِ الصَّلاَةِ فِي سَاعَتَيْنِ بَعْدَ الصُّبْحِ وَبَعْدَ الْعَصْرِ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2417
In-book reference : Book 14, Hadith 105
English translation : Book 13, Hadith 2411
Sahih al-Bukhari 3831

Narrated `Aisha:

'Ashura' (i.e. the tenth of Muharram) was a day on which the tribe of Quraish used to fast in the prelslamic period of ignorance. The Prophet also used to fast on this day. So when he migrated to Medina, he fasted on it and ordered (the Muslims) to fast on it. When the fasting of Ramadan was enjoined, it became optional for the people to fast or not to fast on the day of Ashura.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، قَالَ هِشَامٌ حَدَّثَنِي أَبِي، عَنْ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانَ عَاشُورَاءُ يَوْمًا تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ، وَكَانَ النَّبِيُّ صلى الله عليه وسلم يَصُومُهُ، فَلَمَّا قَدِمَ الْمَدِينَةَ صَامَهُ وَأَمَرَ بِصِيَامِهِ، فَلَمَّا نَزَلَ رَمَضَانُ كَانَ مَنْ شَاءَ صَامَهُ، وَمَنْ شَاءَ لاَ يَصُومُهُ‏.‏
Reference : Sahih al-Bukhari 3831
In-book reference : Book 63, Hadith 56
USC-MSA web (English) reference : Vol. 5, Book 58, Hadith 172
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Sunan an-Nasa'i 1641
It was narrated that 'Aishah, may Allah (SWT) be pleased with her, said:
"I do not know that the Messenger of Allah (SAW) recited the whole Qur'an in one night, or spent a whole night in worship until dawn, or that he ever fasted an entire month apart from Ramadan."
أَخْبَرَنَا هَارُونُ بْنُ إِسْحَاقَ، قَالَ حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، عَنْ سَعِيدٍ، عَنْ قَتَادَةَ، عَنْ زُرَارَةَ بْنِ أَوْفَى، عَنْ سَعْدِ بْنِ هِشَامٍ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ لاَ أَعْلَمُ رَسُولَ اللَّهِ صلى الله عليه وسلم قَرَأَ الْقُرْآنَ كُلَّهُ فِي لَيْلَةٍ وَلاَ قَامَ لَيْلَةً حَتَّى الصَّبَاحِ وَلاَ صَامَ شَهْرًا كَامِلاً قَطُّ غَيْرَ رَمَضَانَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 1641
In-book reference : Book 20, Hadith 44
English translation : Vol. 2, Book 20, Hadith 1642
Abu Qatadah Al-Ansari (RAA) narrated, ‘The Messenger of Allah (P.B.U.H.) was asked about fasting on the day of Arafah (the 9th of the month of Dhul Hijjah). He replied, "Fasting on the day of Arafah is an expiation for the preceding year and the following year.” He was also asked about fasting on the day of Ashura (the 10th of the month of Muharram). He replied, “Fasting on the day of Ashura is an expiation for the preceding year.” The Messenger of Allah (P.B.U.H.) was also asked about fasting on Monday, and he replied, "This is the day on which I was born and the day on which I was sent (with the Message of Islam) and the day on which I received revelation." Related by Muslim.
عَنْ أَبِي قَتَادَةَ اَلْأَنْصَارِيِّ ‏- رضى الله عنه ‏- { أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-سُئِلَ عَنْ صَوْمِ يَوْمِ عَرَفَةَ.‏ قَالَ: " يُكَفِّرُ اَلسَّنَةَ اَلْمَاضِيَةَ وَالْبَاقِيَةَ ", وَسُئِلَ عَنْ صِيَامِ يَوْمِ عَاشُورَاءَ.‏ قَالَ: " يُكَفِّرُ اَلسَّنَةَ اَلْمَاضِيَةَ " وَسُئِلَ عَنْ صَوْمِ يَوْمِ اَلِاثْنَيْنِ, قَالَ: " ذَاكَ يَوْمٌ وُلِدْتُ فِيهِ, وَبُعِثْتُ فِيهِ, أَوْ أُنْزِلَ عَلَيَّ فِيهِ " } رَوَاهُ مُسْلِمٌ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 31
English translation : Book 5, Hadith 700
Arabic reference : Book 5, Hadith 680
Sahih al-Bukhari 1893

Narrated `Aisha:

(The tribe of) Quraish used to fast on the day of Ashura' in the Pre-Islamic period, and then Allah's Apostle ordered (Muslims) to fast on it till the fasting in the month of Ramadan was prescribed; whereupon the Prophet said, "He who wants to fast (on 'Ashura') may fast, and he who does not want to fast may not fast."

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا اللَّيْثُ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، أَنَّ عِرَاكَ بْنَ مَالِكٍ، حَدَّثَهُ أَنَّ عُرْوَةَ أَخْبَرَهُ عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ قُرَيْشًا، كَانَتْ تَصُومُ يَوْمَ عَاشُورَاءَ فِي الْجَاهِلِيَّةِ، ثُمَّ أَمَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِصِيَامِهِ حَتَّى فُرِضَ رَمَضَانُ وَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ شَاءَ فَلْيَصُمْهُ، وَمَنْ شَاءَ أَفْطَرَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1893
In-book reference : Book 30, Hadith 3
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 117
  (deprecated numbering scheme)
Sunan Abi Dawud 2442
'Aishah said:
The Quraish used to fast on the day of 'Ashurah in pre Islamic days. The Messenger of Allah (saws) would fast on it in pre-Islamic period. When the Messenger of Allah (saws) came to Medina, he fasted on it and commanded to fast on it. When the fast of Ramadan was prescribed, that became obligatory, and (fasting on) 'Ashurah was abandoned. He who wishes may fast on it and he who wishes may leave it.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ مَسْلَمَةَ، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ كَانَ يَوْمُ عَاشُورَاءَ يَوْمًا تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُهُ فِي الْجَاهِلِيَّةِ فَلَمَّا قَدِمَ رَسُولُ اللَّهِ صلى الله عليه وسلم الْمَدِينَةَ صَامَهُ وَأَمَرَ بِصِيَامِهِ فَلَمَّا فُرِضَ رَمَضَانُ كَانَ هُوَ الْفَرِيضَةَ وَتُرِكَ عَاشُورَاءُ فَمَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2442
In-book reference : Book 14, Hadith 130
English translation : Book 13, Hadith 2436
Sahih al-Bukhari 1914

Narrated Abu Huraira:

The Prophet said, "None of you should fast a day or two before the month of Ramadan unless he has the habit of fasting (Nawafil) (and if his fasting coincides with that day) then he can fast that day."

حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا هِشَامٌ، حَدَّثَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ لاَ يَتَقَدَّمَنَّ أَحَدُكُمْ رَمَضَانَ بِصَوْمِ يَوْمٍ أَوْ يَوْمَيْنِ، إِلاَّ أَنْ يَكُونَ رَجُلٌ كَانَ يَصُومُ صَوْمَهُ فَلْيَصُمْ ذَلِكَ الْيَوْمَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1914
In-book reference : Book 30, Hadith 24
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 138
  (deprecated numbering scheme)
Sunan an-Nasa'i 2290
It was narrated that Ibn 'Abbas said:
"The Messenger of Allah went out to Makkah, and he fasted until he came to 'Usfan. Then he called for a cup and drank." (One of the narrators) Shubah said: "(That was) in Ramadan. Ibn 'Abbas used to say: 'Whoever wants to fast, may fast, and whoever wants to break may break his fast."'
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا خَالِدٌ، عَنْ شُعْبَةَ، عَنْ مَنْصُورٍ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عَبَّاسٍ، قَالَ خَرَجَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِلَى مَكَّةَ فَصَامَ حَتَّى أَتَى عُسْفَانَ فَدَعَا بِقَدَحٍ فَشَرِبَ - قَالَ شُعْبَةُ - فِي رَمَضَانَ فَكَانَ ابْنُ عَبَّاسٍ يَقُولُ مَنْ شَاءَ صَامَ وَمَنْ شَاءَ أَفْطَرَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2290
In-book reference : Book 22, Hadith 201
English translation : Vol. 3, Book 22, Hadith 2292
Sunan an-Nasa'i 2313
It was narrated that Ibn 'Abbas said:
"The Messenger Allah went out in the year of the Conquest, fasting during Ramadan. Then when he was in Al-Kadid, he broke his fast."
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ عُبَيْدِ اللَّهِ بْنِ عَبْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، قَالَ خَرَجَ رَسُولُ اللَّهِ صلى الله عليه وسلم عَامَ الْفَتْحِ صَائِمًا فِي رَمَضَانَ حَتَّى إِذَا كَانَ بِالْكَدِيدِ أَفْطَرَ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2313
In-book reference : Book 22, Hadith 224
English translation : Vol. 3, Book 22, Hadith 2315

Malik was asked whether someone who went into a mosque to do itikaf for the last ten days of Ramadan and stayed there for a day or two but then became ill and left the mosque, had to do itikaf for the number of days that were left from the ten, or not, and if he did have to do so, then what month should he do it in, and he replied, "He should make up whatever he has to do of the itikaf when he recovers, whether in Ramadan or otherwise. I have heard that the Messenger of Allah, may Allah bless him and grant him peace, once wanted to do itikaf in Ramadan, but then came back without having done so, and then when Ramadan had gone, he did itikaf for ten days in Shawwal.

Some one who does itikaf voluntarily in Ramadan and some one who has to do itikaf are in the same position regarding what is halal for them and what is haram. I have not heard that the Messenger of Allah, may Allah bless him and grant him peace, ever did itikaf other than voluntarily."

Malik said, that if a woman did itikaf and then menstruated during her itikaf, she went back to her house, and, when she was pure again she returned to the mosque, at whatever time it was that she became pure. She then continued her itikaf from where she left off. This was the same situation as with a woman who had to fast two consecutive months, and who menstruated and then became pure. She then continued the fast from where she had left off and did not delay doing so.

USC-MSA web (English) reference : Book 19, Hadith 8
Sahih al-Bukhari 1948

Narrated Tawus:

Ibn `Abbas said, "Allah's Apostle set out from Medina to Mecca and he fasted till he reached 'Usfan, where he asked for water and raised his hand to let the people see him, and then broke the fast, and did not fast after that till he reached Mecca, and that happened in Ramadan." Ibn `Abbas used to say, "Allah's Apostle (sometimes) fasted and (sometimes) did not fast during the journeys so whoever wished to fast could fast, and whoever wished not to fast, could do so."

حَدَّثَنَا مُوسَى بْنُ إِسْمَاعِيلَ، حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ مَنْصُورٍ، عَنْ مُجَاهِدٍ، عَنْ طَاوُسٍ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ خَرَجَ رَسُولُ اللَّهِ صلى الله عليه وسلم مِنَ الْمَدِينَةِ إِلَى مَكَّةَ، فَصَامَ حَتَّى بَلَغَ عُسْفَانَ، ثُمَّ دَعَا بِمَاءٍ فَرَفَعَهُ إِلَى يَدَيْهِ لِيُرِيَهُ النَّاسَ فَأَفْطَرَ، حَتَّى قَدِمَ مَكَّةَ، وَذَلِكَ فِي رَمَضَانَ فَكَانَ ابْنُ عَبَّاسٍ يَقُولُ قَدْ صَامَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَأَفْطَرَ، فَمَنْ شَاءَ صَامَ، وَمَنْ شَاءَ أَفْطَرَ‏.‏
Reference : Sahih al-Bukhari 1948
In-book reference : Book 30, Hadith 55
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 169
  (deprecated numbering scheme)
Ash-Shama'il Al-Muhammadiyah 308
A’isha said:
"‘Ashura' was a day on which Quraish used to fast in the pagan era [al-jahiliyya], and Allah’s Messenger (Allah bless him and give him peace) used to keep it as well. Hence, when he arrived in Medina, he kept its fast and commanded its observance. Then, when Ramadan was decreed, [the fast of] Ramadan became the obligatory religious duty, and 'Ashura' was omitted, so one is free to fast this day or not to fast it.”
حَدَّثَنَا هَارُونُ بْنُ إِسْحَاقَ الْهَمْدَانِيُّ، قَالَ‏:‏ حَدَّثَنَا عَبْدَةُ بْنُ سُلَيْمَانَ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ‏:‏ كَانَ عَاشُورَاءُ يَوْمًا تَصُومُهُ قُرَيْشٌ فِي الْجَاهِلِيَّةِ، وَكَانَ رَسُولُ اللهِ صلى الله عليه وسلم يَصُومُهُ، فَلَمَّا قَدِمَ الْمَدِينَةَ صَامَهُ وَأَمَرَ بِصِيَامِهِ، فَلَمَّا افْتُرِضَ رَمَضَانُ كَانَ رَمَضَانُ هُوَ الْفَرِيضَةُ وَتُرِكَ عَاشُورَاءُ، فَمَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ‏.‏
Grade: Sahih Isnād (Zubair `Aliza'i)
Reference : Ash-Shama'il Al-Muhammadiyah 308
In-book reference : Book 43, Hadith 12

Yahya related to me from Malik from Abd ar-Rahman ibn al-Qasim that his father used to say, "If someone has to make up for days not fasted in Ramadan and does not do them before the next Ramadan comes although he is strong enough to do so, he should feed a poor man with a mudd of wheat for every day that he has missed, and he has to fast the days he owes as well."

Yahya related to me from Malik that he had heard the same thing from Said ibn Jubayr.

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ الْقَاسِمِ، عَنْ أَبِيهِ، أَنَّهُ كَانَ يَقُولُ مَنْ كَانَ عَلَيْهِ قَضَاءُ رَمَضَانَ فَلَمْ يَقْضِهِ - وَهُوَ قَوِيٌّ عَلَى صِيَامِهِ - حَتَّى جَاءَ رَمَضَانُ آخَرُ فَإِنَّهُ يُطْعِمُ مَكَانَ كُلِّ يَوْمٍ مِسْكِينًا مُدًّا مِنْ حِنْطَةٍ وَعَلَيْهِ مَعَ ذَلِكَ الْقَضَاءُ ‏.‏ وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ عَنْ سَعِيدِ بْنِ جُبَيْرٍ، مِثْلُ ذَلِكَ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 53
Arabic reference : Book 18, Hadith 686
Sahih al-Bukhari 1892

Narrated Ibn `Umar:

The Prophet observed the fast on the 10th of Muharram ('Ashura), and ordered (Muslims) to fast on that day, but when the fasting of the month of Ramadan was prescribed, the fasting of the 'Ashura' was abandoned. `Abdullah did not use to fast on that day unless it coincided with his routine fasting by chance.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا إِسْمَاعِيلُ، عَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ صَامَ النَّبِيُّ صلى الله عليه وسلم عَاشُورَاءَ، وَأَمَرَ بِصِيَامِهِ‏.‏ فَلَمَّا فُرِضَ رَمَضَانُ تُرِكَ‏.‏ وَكَانَ عَبْدُ اللَّهِ لاَ يَصُومُهُ، إِلاَّ أَنْ يُوَافِقَ صَوْمَهُ‏.‏
Reference : Sahih al-Bukhari 1892
In-book reference : Book 30, Hadith 2
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 116
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Mishkat al-Masabih 1973
Abu Huraira reported God’s messenger as saying, “None of you must fast one day or two days just before Ramadan, except in the case of a man who has been in the habit of observing a particular fast, for he may fast on that day.”* *If a man is in the habit of fasting on a particular day of the week and one or other of the two days before Ramadan falls on that day, he may observe his usual practice. (Bukhari and Muslim.)
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا يَتَقَدَّمَنَّ أَحَدُكُمْ رَمَضَانَ بِصَوْمِ يَوْمٍ أَوْ يَوْمَيْنِ إِلَّا أَنْ يَكُونَ رَجُلٌ كَانَ يَصُوم صوما فليصم ذَلِك الْيَوْم»
  مُتَّفَقٌ عَلَيْهِ   (الألباني) حكم   :
Reference : Mishkat al-Masabih 1973
In-book reference : Book 7, Hadith 17
Riyad as-Salihin 1224
Abu Hurairah (May Allah be pleased with him) reported:
The Prophet (PBUH) said, "Do not observe Saum (fasting) for a day or two days preceding Ramadan. However, if a person is in the habit of observing Saum on a particular day (which may fall on these dates), he may fast on that day."

[Al-Bukhari and Muslim].

عن أبي هريرة رضي الله عنه عن النبي صلى الله عليه وسلم قال‏:‏ ‏ "‏لا يتقدمن أحدكم رمضان بصوم يوم أو يومين، إلا أن يكون رجل كان يصوم صومه، فليصم ذلك اليوم‏"‏ ‏.‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏
Reference : Riyad as-Salihin 1224
In-book reference : Book 8, Hadith 234

Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to say, "Someone who breaks the fast in Ramadan because he is ill or travelling should make up the days he has missed consecutively."

وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَقُولُ يَصُومُ قَضَاءَ رَمَضَانَ مُتَتَابِعًا مَنْ أَفْطَرَهُ مِنْ مَرَضٍ أَوْ فِي سَفَرٍ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 45
Arabic reference : Book 18, Hadith 678
Sunan Abi Dawud 2443
Ibn 'Umar said:
'Ashurah was a day on which we used to fast in pre-Islamic days. When (fasting of) Ramadan was prescribed, the Messenger of Allah (saws) said: This is one of the days of Allah ; he who wishes may fast on it.
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، قَالَ أَخْبَرَنِي نَافِعٌ، عَنِ ابْنِ عُمَرَ، قَالَ كَانَ عَاشُورَاءُ يَوْمًا نَصُومُهُ فِي الْجَاهِلِيَّةِ فَلَمَّا نَزَلَ رَمَضَانُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ هَذَا يَوْمٌ مِنْ أَيَّامِ اللَّهِ فَمَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ ‏"‏ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2443
In-book reference : Book 14, Hadith 131
English translation : Book 13, Hadith 2437
Sunan an-Nasa'i 2263
It was narrated that Jabir said:
"The Messenger of Allah went out to Makkah in the year of the Conquest in Ramadan. He fasted until he reached Kura Al-Ghamim, and the people fast, so he called for a vessel of water after 'Asr and drank it while the people were looking on. Then some of the people broke their fast and some continued to fast. He heard that some people were still fasting and he said: 'Those are the disobedient ones.
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ عَبْدِ الْحَكَمِ، عَنْ شُعَيْبٍ، قَالَ أَنْبَأَنَا اللَّيْثُ، عَنِ ابْنِ الْهَادِ، عَنْ جَعْفَرِ بْنِ مُحَمَّدٍ، عَنْ أَبِيهِ، عَنْ جَابِرٍ، قَالَ خَرَجَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِلَى مَكَّةَ عَامَ الْفَتْحِ فِي رَمَضَانَ فَصَامَ حَتَّى بَلَغَ كُرَاعَ الْغَمِيمِ فَصَامَ النَّاسُ فَبَلَغَهُ أَنَّ النَّاسَ قَدْ شَقَّ عَلَيْهِمُ الصِّيَامُ فَدَعَا بِقَدَحٍ مِنَ الْمَاءِ بَعْدَ الْعَصْرِ فَشَرِبَ وَالنَّاسُ يَنْظُرُونَ فَأَفْطَرَ بَعْضُ النَّاسِ وَصَامَ بَعْضٌ فَبَلَغَهُ أَنَّ نَاسًا صَامُوا فَقَالَ ‏ "‏ أُولَئِكَ الْعُصَاةُ ‏"‏ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2263
In-book reference : Book 22, Hadith 174
English translation : Vol. 3, Book 22, Hadith 2265
Sahih Muslim 1127 d

'Alqama reported that Ash'ath b. Qais went to Ibn Mas'udd while he was eating on the day of Ashura. Thereupon he said:

Abu Abd al-Rahman, it is the day of 'Ashura (and you are eating). Upon this he said: Fast was observed on (this day) before the (fasting) in Ramadan was made obligatory, but when it was made obligatory, (fasting on the day of 'Ashura) was abandoned. So if you are not fasting, then take food.
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، حَدَّثَنَا إِسْرَائِيلُ، عَنْ مَنْصُورٍ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، قَالَ دَخَلَ الأَشْعَثُ بْنُ قَيْسٍ عَلَى ابْنِ مَسْعُودٍ وَهُوَ يَأْكُلُ يَوْمَ عَاشُورَاءَ فَقَالَ يَا أَبَا عَبْدِ الرَّحْمَنِ إِنَّ الْيَوْمَ يَوْمُ عَاشُورَاءَ ‏.‏ فَقَالَ قَدْ كَانَ يُصَامُ قَبْلَ أَنْ يَنْزِلَ رَمَضَانُ فَلَمَّا نَزَلَ رَمَضَانُ تُرِكَ فَإِنْ كُنْتَ مُفْطِرًا فَاطْعَمْ ‏.‏
Reference : Sahih Muslim 1127d
In-book reference : Book 13, Hadith 157
USC-MSA web (English) reference : Book 6, Hadith 2513
  (deprecated numbering scheme)
Sahih Muslim 1156 c

Abdullah b. Shaqiq reported. I asked 'A'isha (Allah be pleased with her) about fasting of the Messenger of Allah (may peace be upon him). She said:

He used to observe fast (at times) so continuously that we said: He has fasted, he has fasted. And (at times) he did not observe fast (for days) and we began to say: He has abandoned fasting, he has abandoned fasting. She said: I did not see him observing fast throughout the whole of the month since he arrived in Medina, but that of Ramadan.
وَحَدَّثَنِي أَبُو الرَّبِيعِ الزَّهْرَانِيُّ، حَدَّثَنَا حَمَّادٌ، عَنْ أَيُّوبَ، وَهِشَامٍ، عَنْ مُحَمَّدٍ، عَنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ، - قَالَ حَمَّادٌ وَأَظُنُّ أَيُّوبَ قَدْ سَمِعَهُ مِنْ عَبْدِ اللَّهِ بْنِ شَقِيقٍ، - قَالَ سَأَلْتُ عَائِشَةَ - رضى الله عنها - عَنْ صَوْمِ النَّبِيِّ صلى الله عليه وسلم فَقَالَتْ كَانَ يَصُومُ حَتَّى نَقُولَ قَدْ صَامَ قَدْ صَامَ ‏.‏ وَيُفْطِرُ حَتَّى نَقُولَ قَدْ أَفْطَرَ قَدْ أَفْطَرَ - قَالَتْ - وَمَا رَأَيْتُهُ صَامَ شَهْرًا كَامِلاً مُنْذُ قَدِمَ الْمَدِينَةَ إِلاَّ أَنْ يَكُونَ رَمَضَانَ ‏.‏
Reference : Sahih Muslim 1156c
In-book reference : Book 13, Hadith 225
USC-MSA web (English) reference : Book 6, Hadith 2578
  (deprecated numbering scheme)
Mishkat al-Masabih 2048
Abu Sa'id al-Khudri said God’s messenger forbade fasting on the day of breaking the fast of Ramadan and on the day of sacrifice. (Bukhari and Muslim.)
وَعَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ قَالَ: نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ صَوْمِ يَوْمِ الْفِطْرِ وَالنَّحْرِ
  مُتَّفَقٌ عَلَيْهِ   (الألباني) حكم   :
Reference : Mishkat al-Masabih 2048
In-book reference : Book 7, Hadith 91
Sunan Abi Dawud 2335
Narrated Abu Hurairah:
The Messenger of Allah (saws) as saying: Do not fast one day or two days just before Ramadan, except in the case of a man who has been in the habit of observing the particular fast, for he may fast on that day.
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا هِشَامٌ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ لاَ تَقَدَّمُوا صَوْمَ رَمَضَانَ بِيَوْمٍ وَلاَ يَوْمَيْنِ إِلاَّ أَنْ يَكُونَ صَوْمًا يَصُومُهُ رَجُلٌ فَلْيَصُمْ ذَلِكَ الصَّوْمَ ‏"‏ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2335
In-book reference : Book 14, Hadith 23
English translation : Book 13, Hadith 2328
Sunan Abi Dawud 2327

Narrated Abdullah ibn Abbas:

The Prophet (saws) said: Do not fast one day or two days just before Ramadan except in the case of a man who has been in the habit or observing a fast (on that day); and do not fast until you sight it (the moon). Then fast until you sight it. If a cloud appears on that day (i.e. 29th of Ramadan) then complete the number thirty (days) and then end the fasting: a month consists of twenty-nine days.

حَدَّثَنَا الْحَسَنُ بْنُ عَلِيٍّ، حَدَّثَنَا حُسَيْنٌ، عَنْ زَائِدَةَ، عَنْ سِمَاكٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ لاَ تُقَدِّمُوا الشَّهْرَ بِصِيَامِ يَوْمٍ وَلاَ يَوْمَيْنِ إِلاَّ أَنْ يَكُونَ شَىْءٌ يَصُومُهُ أَحَدُكُمْ وَلاَ تَصُومُوا حَتَّى تَرَوْهُ ثُمَّ صُومُوا حَتَّى تَرَوْهُ فَإِنْ حَالَ دُونَهُ غَمَامَةٌ فَأَتِمُّوا الْعِدَّةَ ثَلاَثِينَ ثُمَّ أَفْطِرُوا وَ الشَّهْرُ تِسْعٌ وَعِشْرُونَ ‏"‏ ‏.‏ قَالَ أَبُو دَاوُدَ رَوَاهُ حَاتِمُ بْنُ أَبِي صَغِيرَةَ وَشُعْبَةُ وَالْحَسَنُ بْنُ صَالِحٍ عَنْ سِمَاكٍ بِمَعْنَاهُ لَمْ يَقُولُوا ‏"‏ ثُمَّ أَفْطِرُوا ‏"‏ ‏.‏ قَالَ أَبُو دَاوُدَ وَهُوَ حَاتِمُ بْنُ مُسْلِمِ بْنِ أَبِي صَغِيرَةَ وَأَبُو صَغِيرَةَ زَوْجُ أُمِّهِ ‏.‏
Grade: Sahih (Al-Albani)  صحيح   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2327
In-book reference : Book 14, Hadith 15
English translation : Book 13, Hadith 2320
Jami` at-Tirmidhi 688
Ibn Abbas narrated that :
the Messenger of Allah said: "Do not fast before Ramadan. Fast with its sighting, and break fast with its sighting, and if it is obscured from you, then complete thirty days."
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا أَبُو الأَحْوَصِ، عَنْ سِمَاكِ بْنِ حَرْبٍ، عَنْ عِكْرِمَةَ، عَنِ ابْنِ عَبَّاسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لاَ تَصُومُوا قَبْلَ رَمَضَانَ صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ حَالَتْ دُونَهُ غَيَايَةٌ فَأَكْمِلُوا ثَلاَثِينَ يَوْمًا ‏"‏ ‏.‏ وَفِي الْبَابِ عَنْ أَبِي هُرَيْرَةَ وَأَبِي بَكْرَةَ وَابْنِ عُمَرَ ‏.‏ قَالَ أَبُو عِيسَى حَدِيثُ ابْنِ عَبَّاسٍ حَدِيثٌ حَسَنٌ صَحِيحٌ وَقَدْ رُوِيَ عَنْهُ مِنْ غَيْرِ وَجْهٍ ‏.‏
Grade: Sahih (Darussalam)
Reference : Jami` at-Tirmidhi 688
In-book reference : Book 8, Hadith 7
English translation : Vol. 2, Book 3, Hadith 688
Sahih Muslim 1082 a

Abu Huraira (Allah be pleased with him) reported Allah's Messenger (may peace be upon him) as saying:

Do not observe fast for a day, or two days ahead of Ramadan except a person who is in the habit of observing a particular fast; he may fast on that day.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَأَبُو كُرَيْبٍ قَالَ أَبُو بَكْرٍ حَدَّثَنَا وَكِيعٌ، عَنْ عَلِيِّ، بْنِ مُبَارَكٍ عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، - رضى الله عنه - قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لاَ تَقَدَّمُوا رَمَضَانَ بِصَوْمِ يَوْمٍ وَلاَ يَوْمَيْنِ إِلاَّ رَجُلٌ كَانَ يَصُومُ صَوْمًا فَلْيَصُمْهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1082a
In-book reference : Book 13, Hadith 24
USC-MSA web (English) reference : Book 6, Hadith 2382
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Sahih al-Bukhari 2001

Narrated `Aisha:

Allah's Apostle ordered (the Muslims) to fast on the day of 'Ashura', and when fasting in the month of Ramadan was prescribed, it became optional for one to fast on that day ('Ashura') or not.

حَدَّثَنَا أَبُو الْيَمَانِ، أَخْبَرَنَا شُعَيْبٌ، عَنِ الزُّهْرِيِّ، قَالَ أَخْبَرَنِي عُرْوَةُ بْنُ الزُّبَيْرِ، أَنَّ عَائِشَةَ ـ رضى الله عنها ـ قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم أَمَرَ بِصِيَامِ يَوْمِ عَاشُورَاءَ، فَلَمَّا فُرِضَ رَمَضَانُ كَانَ مَنْ شَاءَ صَامَ، وَمَنْ شَاءَ أَفْطَرَ‏.‏
Reference : Sahih al-Bukhari 2001
In-book reference : Book 30, Hadith 106
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 219
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Sunan Abi Dawud 2432

Narrated Muslim al-Qurashi:

I asked or someone asked the Prophet (saws) about perpetual fasting. He replied: You have a duty to your family. Fast during Ramadan and the following month, and every Wednesday and Thursday. You will then have observed a perpetual fast.

حَدَّثَنَا مُحَمَّدُ بْنُ عُثْمَانَ الْعِجْلِيُّ، حَدَّثَنَا عُبَيْدُ اللَّهِ، - يَعْنِي ابْنَ مُوسَى - عَنْ هَارُونَ بْنِ سَلْمَانَ، عَنْ عُبَيْدِ اللَّهِ بْنِ مُسْلِمٍ الْقُرَشِيِّ، عَنْ أَبِيهِ، قَالَ سَأَلْتُ - أَوْ سُئِلَ النَّبِيُّ صلى الله عليه وسلم - عَنْ صِيَامِ الدَّهْرِ فَقَالَ ‏ "‏ إِنَّ لأَهْلِكَ عَلَيْكَ حَقًّا صُمْ رَمَضَانَ وَالَّذِي يَلِيهِ وَكُلَّ أَرْبِعَاءَ وَخَمِيسٍ فَإِذَا أَنْتَ قَدْ صُمْتَ الدَّهْرَ ‏"‏ ‏.‏ قَالَ أَبُو دَاوُدَ وَافَقَهُ زَيْدٌ الْعُكْلِيُّ وَخَالَفَهُ أَبُو نُعَيْمٍ قَالَ مُسْلِمُ بْنُ عُبَيْدِ اللَّهِ ‏.‏
Grade: Da'if (Al-Albani)  ضعيف   (الألباني) حكم   :
Reference : Sunan Abi Dawud 2432
In-book reference : Book 14, Hadith 120
English translation : Book 13, Hadith 2426
Sahih Muslim 1125 e

'A'isha (Allah be pleased with her) reported that the Quraish used to fast on the day of Ashura during the pre-Islamic days. The Messenger of Allah (may peace be upon him) then commanded to fast on that day till (fasting) in Ramadan became obligatory. Then the Messenger of Allah (may peace be upon him) said:

He who wishes to fast should do so, and he who wishes to break it may do so.
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، وَمُحَمَّدُ بْنُ رُمْحٍ، جَمِيعًا عَنِ اللَّيْثِ بْنِ سَعْدٍ، - قَالَ ابْنُ رُمْحٍ أَخْبَرَنَا اللَّيْثُ، - عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، أَنَّ عِرَاكًا، أَخْبَرَهُ أَنَّ عُرْوَةَ أَخْبَرَهُ أَنَّ عَائِشَةَ أَخْبَرَتْهُ أَنَّ قُرَيْشًا كَانَتْ تَصُومُ عَاشُورَاءَ فِي الْجَاهِلِيَّةِ ثُمَّ أَمَرَ رَسُولُ اللَّهِ صلى الله عليه وسلم بِصِيَامِهِ حَتَّى فُرِضَ رَمَضَانُ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ مَنْ شَاءَ فَلْيَصُمْهُ وَمَنْ شَاءَ فَلْيُفْطِرْهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1125e
In-book reference : Book 13, Hadith 147
USC-MSA web (English) reference : Book 6, Hadith 2503
  (deprecated numbering scheme)
Sahih Muslim 1125 d

'A'isha (Allah be pleased with her) reported that the Messenger of Allah (may peace be upon him) had ordered to observe fast (on 'Ashura) before the fasting in Ramadan was made obligatory. But when it became obligatory, then he who wished fasted on the day of Ashura, and he who wished did not observe it (on that day).

حَدَّثَنَا حَرْمَلَةُ بْنُ يَحْيَى، أَخْبَرَنَا ابْنُ وَهْبٍ، أَخْبَرَنِي يُونُسُ، عَنِ ابْنِ شِهَابٍ، أَخْبَرَنِي عُرْوَةُ بْنُ الزُّبَيْرِ، أَنَّ عَائِشَةَ، - رضى الله عنها - قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَأْمُرُ بِصِيَامِهِ قَبْلَ أَنْ يُفْرَضَ رَمَضَانُ فَلَمَّا فُرِضَ رَمَضَانُ كَانَ مَنْ شَاءَ صَامَ يَوْمَ عَاشُورَاءَ وَمَنْ شَاءَ أَفْطَرَ ‏.‏
Reference : Sahih Muslim 1125d
In-book reference : Book 13, Hadith 146
USC-MSA web (English) reference : Book 6, Hadith 2502
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27 Yahya related to me from Malik that he had heard that Umar ibn al-Khattab, if he was travelling in Ramadan and knew that he would reach Madina at the begining of the day ,would do so fasting.

Yahya said that Malik said, "Someone who is travelling and knows that he will be reaching his people in the first part of the day, and then dawn breaks before he gets there, should be fasting when he gets there."

Malik said, "Someone who intends to go away (on a journey) in Ramadan, and then dawn breaks while he is still on his land before he has left, should fast that day."

Malik said that a man who returns from a journey in Ramadan and is not fasting may have sexual intercourse with his wife if he wishes, if she is not fasting and she has just become pure after her menses.

حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، كَانَ إِذَا كَانَ فِي سَفَرٍ فِي رَمَضَانَ فَعَلِمَ أَنَّهُ دَاخِلٌ الْمَدِينَةَ مِنْ أَوَّلِ يَوْمِهِ دَخَلَ وَهُوَ صَائِمٌ ‏.‏ قَالَ يَحْيَى قَالَ مَالِكٌ مَنْ كَانَ فِي سَفَرٍ فَعَلِمَ أَنَّهُ دَاخِلٌ عَلَى أَهْلِهِ مِنْ أَوَّلِ يَوْمِهِ وَطَلَعَ لَهُ الْفَجْرُ قَبْلَ أَنْ يَدْخُلَ دَخَلَ وَهُوَ صَائِمٌ ‏.‏ قَالَ مَالِكٌ وَإِذَا أَرَادَ أَنْ يَخْرُجَ فِي رَمَضَانَ فَطَلَعَ لَهُ الْفَجْرُ وَهُوَ بِأَرْضِهِ قَبْلَ أَنْ يَخْرُجَ فَإِنَّهُ يَصُومُ ذَلِكَ الْيَوْمَ ‏.‏ قَالَ مَالِكٌ فِي الرَّجُلِ يَقْدَمُ مِنْ سَفَرِهِ وَهُوَ مُفْطِرٌ وَامْرَأَتُهُ مُفْطِرَةٌ حِينَ طَهُرَتْ مِنْ حَيْضِهَا فِي رَمَضَانَ أَنَّ لِزَوْجِهَا أَنْ يُصِيبَهَا إِنْ شَاءَ ‏.‏
USC-MSA web (English) reference : Book 18, Hadith 27
Arabic reference : Book 18, Hadith 661
Sunan Ibn Majah 1328
It was narrated that Nadr bin Shaiban said:
“I met Abu Salamah bin ‘Abdur-Rahman and said: ‘Tell me a Hadith that you heard from your father, in which mention is made of the month of Ramadan.’ He said: ‘Yes, my father narrated to me that the Messenger of Allah (saw) mentioned the month of Ramadan and said: “A month which Allah has enjoined upon you to fast, and in which I have established Qiyam (prayers at night) as Sunnah for you. So whoever fasts it and spends its nights in prayer out of faith and in hope of reward; he will emerge from his sins as on the day his mother bore him.”
حَدَّثَنَا عَلِيُّ بْنُ مُحَمَّدٍ، حَدَّثَنَا وَكِيعٌ، وَعُبَيْدُ اللَّهِ بْنُ مُوسَى، عَنْ نَصْرِ بْنِ عَلِيٍّ الْجَهْضَمِيِّ، عَنِ النَّضْرِ بْنِ شَيْبَانَ، ح وَحَدَّثَنَا يَحْيَى بْنُ حَكِيمٍ، حَدَّثَنَا أَبُو دَاوُدَ، حَدَّثَنَا نَصْرُ بْنُ عَلِيٍّ الْجَهْضَمِيُّ، وَالْقَاسِمُ بْنُ الْفَضْلِ الْحُدَّانِيُّ، كِلاَهُمَا عَنِ النَّضْرِ بْنِ شَيْبَانَ، قَالَ لَقِيتُ أَبَا سَلَمَةَ بْنَ عَبْدِ الرَّحْمَنِ فَقُلْتُ حَدِّثْنِي بِحَدِيثٍ، سَمِعْتَهُ مِنْ، أَبِيكَ يَذْكُرُهُ فِي شَهْرِ رَمَضَانَ ‏.‏ قَالَ نَعَمْ ‏.‏ حَدَّثَنِي أَبِي أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ ذَكَرَ شَهْرَ رَمَضَانَ فَقَالَ ‏ "‏ شَهْرٌ كَتَبَ اللَّهُ عَلَيْكُمْ صِيَامَهُ وَسَنَنْتُ لَكُمْ قِيَامَهُ فَمَنْ صَامَهُ وَقَامَهُ إِيمَانًا وَاحْتِسَابًا خَرَجَ مِنْ ذُنُوبِهِ كَيَوْمَ وَلَدَتْهُ أُمُّهُ ‏"‏ ‏.‏
Grade: Da’if (Darussalam)
Reference : Sunan Ibn Majah 1328
In-book reference : Book 5, Hadith 526
English translation : Vol. 1, Book 5, Hadith 1328
Mishkat al-Masabih 2061
Muslim al-Qurashi said that he or someone else asked God's messenger about perpetual fasting, and he replied, “You have a duty to your family. Fast during Ramadan and the following month, and every Wednesday and Thursday. You will then have observed a perpetual fast." Abu Dawud and Tirmidhi transmitted it.
وَعَن مُسلم الْقرشِي قَالَ: سَأَلت أَوْ سُئِلَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَن صِيَام الدَّهْر فَقَالَ: «إِنَّ لِأَهْلِكَ عَلَيْكَ حَقًّا صُمْ رَمَضَانَ وَالَّذِي يَلِيهِ وَكُلَّ أَرْبِعَاءَ وَخَمِيسٍ فَإِذًا أَنْتَ قَدْ صُمْتَ الدَّهْرَ كُلَّهُ» . رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ
  لم تتمّ دراسته   (الألباني) حكم   :
Reference : Mishkat al-Masabih 2061
In-book reference : Book 7, Hadith 104
Abu Sa'id Al-Khudri (RAA) narrated. ‘The Messenger of Allah (P.B.U.H.) has prohibited fasting on two days; the day of Fitr (breaking the fast of Ramadan) and on the day of sacrifice ('Idul Adha).’ Agreed upon.
وَعَنْ أَبِي سَعِيدٍ اَلْخُدْرِيِّ ‏- رضى الله عنه ‏- { أَنَّ رَسُولَ اَللَّهِ ‏- صلى الله عليه وسلم ‏-نَهَى عَنْ صِيَامِ يَوْمَيْنِ: يَوْمِ اَلْفِطْرِ وَيَوْمِ اَلنَّحْرِ } مُتَّفَقٌ عَلَيْهِ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 37
English translation : Book 5, Hadith 706
Arabic reference : Book 5, Hadith 686
Sunan an-Nasa'i 2210
An-Nadr bin Shaiban said:
"I said to Abu Salamah bin 'Abdur-Rahman: 'Tell me of something that you heard from your father, that he heard from the Messenger of Allah, with no one in between your father and Messenge of Allah concerning the month of Ramadan. He said: 'Yes; my father said: The Messenger of Allah said: Allah, may He be blessed and exalted, enjoined the fast of Ramadan upon you, and I have made it Sunnah for you to spend its nights in prayer. Whoever fasts it and spends its nights in prayer out of faith and in the hope of reward, he will emerge from his sins as on the day his mother bore him."' (Daif)
أَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُبَارَكِ، قَالَ حَدَّثَنَا أَبُو هِشَامٍ، قَالَ حَدَّثَنَا الْقَاسِمُ بْنُ الْفَضْلِ، قَالَ حَدَّثَنَا النَّضْرُ بْنُ شَيْبَانَ، قَالَ قُلْتُ لأَبِي سَلَمَةَ بْنِ عَبْدِ الرَّحْمَنِ حَدِّثْنِي بِشَىْءٍ، سَمِعْتَهُ مِنْ، أَبِيكَ سَمِعَهُ أَبُوكَ، مِنْ رَسُولِ اللَّهِ صلى الله عليه وسلم لَيْسَ بَيْنَ أَبِيكَ وَبَيْنَ رَسُولِ اللَّهِ صلى الله عليه وسلم أَحَدٌ فِي شَهْرِ رَمَضَانَ ‏.‏ قَالَ نَعَمْ حَدَّثَنِي أَبِي قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ إِنَّ اللَّهَ تَبَارَكَ وَتَعَالَى فَرَضَ صِيَامَ رَمَضَانَ عَلَيْكُمْ وَسَنَنْتُ لَكُمْ قِيَامَهُ فَمَنْ صَامَهُ وَقَامَهُ إِيمَانًا وَاحْتِسَابًا خَرَجَ مِنْ ذُنُوبِهِ كَيَوْمِ وَلَدَتْهُ أُمُّهُ ‏"‏ ‏.‏
Reference : Sunan an-Nasa'i 2210
In-book reference : Book 22, Hadith 121
English translation : Vol. 3, Book 22, Hadith 2212
Sunan an-Nasa'i 2189
It was narrated that Simak said:
"I entered upon 'Ikrimah on the day concerning which there was doubt as to whether it was Ramadan or Shaban, and he was eating bread, vegetables and milk. He said: 'Come and eat.' I said: 'I am fasting.' He adjured me by Allah to break my fast. I said Subhan-Allah twice. When I saw that he was insisting, I went forward and said: 'Give me what you have.' He said: 'I heard Ibn 'Abbas say: The Messenger of Allah said: 'Fast when you see it (the crescent) and stop fasting when you see it, and if clouds or darkness prevent you from seeing it, then complete the number of days of Shaban, and do not fast ahead of the month, and do not join Ramadan to a day of Shaban." '
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ أَبِي يُونُسَ، عَنْ سِمَاكٍ، قَالَ دَخَلْتُ عَلَى عِكْرِمَةَ فِي يَوْمٍ قَدْ أُشْكِلَ مِنْ رَمَضَانَ هُوَ أَمْ مِنْ شَعْبَانَ وَهُوَ يَأْكُلُ خُبْزًا وَبَقْلاً وَلَبَنًا فَقَالَ لِي هَلُمَّ ‏.‏ فَقُلْتُ إِنِّي صَائِمٌ ‏.‏ قَالَ وَحَلَفَ بِاللَّهِ لَتُفْطِرَنَّ قُلْتُ سُبْحَانَ اللَّهِ مَرَّتَيْنِ فَلَمَّا رَأَيْتُهُ يَحْلِفُ لاَ يَسْتَثْنِي تَقَدَّمْتُ قُلْتُ هَاتِ الآنَ مَا عِنْدَكَ قَالَ سَمِعْتُ ابْنَ عَبَّاسٍ يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ صُومُوا لِرُؤْيَتِهِ وَأَفْطِرُوا لِرُؤْيَتِهِ فَإِنْ حَالَ بَيْنَكُمْ وَبَيْنَهُ سَحَابَةٌ أَوْ ظُلْمَةٌ فَأَكْمِلُوا الْعِدَّةَ عِدَّةَ شَعْبَانَ وَلاَ تَسْتَقْبِلُوا الشَّهْرَ اسْتِقْبَالاً وَلاَ تَصِلُوا رَمَضَانَ بِيَوْمٍ مِنْ شَعْبَانَ ‏"‏ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2189
In-book reference : Book 22, Hadith 100
English translation : Vol. 3, Book 22, Hadith 2191
Sunan an-Nasa'i 2178
It was narrated that Aishah said:
"One of us (women) would miss some fasts in Ramadan and she would not be able to make it up until Shaban began, and the Messenger of Allah did not fast in any month as he fasted in Shaban; he used to fast all of it, except a little, he used to fast all of it." '
أَخْبَرَنَا أَحْمَدُ بْنُ سَعْدِ بْنِ الْحَكَمِ، قَالَ حَدَّثَنَا عَمِّي، قَالَ حَدَّثَنَا نَافِعُ بْنُ يَزِيدَ، أَنَّ ابْنَ الْهَادِ، حَدَّثَهُ أَنَّ مُحَمَّدَ بْنَ إِبْرَاهِيمَ حَدَّثَهُ عَنْ أَبِي سَلَمَةَ، - يَعْنِي ابْنَ عَبْدِ الرَّحْمَنِ - عَنْ عَائِشَةَ، قَالَتْ لَقَدْ كَانَتْ إِحْدَانَا تُفْطِرُ فِي رَمَضَانَ فَمَا تَقْدِرُ عَلَى أَنْ تَقْضِيَ حَتَّى يَدْخُلَ شَعْبَانُ وَمَا كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُ فِي شَهْرٍ مَا يَصُومُ فِي شَعْبَانَ كَانَ يَصُومُهُ كُلَّهُ إِلاَّ قَلِيلاً بَلْ كَانَ يَصُومُهُ كُلَّهُ ‏.‏
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 2178
In-book reference : Book 22, Hadith 89
English translation : Vol. 3, Book 22, Hadith 2180
Sahih Muslim 1087

Kuraib reported that Umm Fadl, daughter of Harith, sent him (Fadl, i.e. her son) to Mu'awiya in Syria. I (Fadl) arrived in Syria, and did the needful for her. It was there in Syria that the month of Ramadan commenced. I saw the new moon (of Ramadan) on Friday. I then came back to Medina at the end of the month. Abdullah b. 'Abbas (Allah be pleased with him) asked me (about the new moon of Ramadan) and said:

When did you see it? I said: We saw it on the night of Friday. He said: (Did) you see it yourself? I said: Yes, and the people also saw it and they fasted and Mu'awiya also fasted, whereupon he said: But we saw it on Saturday night. So we will continue to fast till we complete thirty (fasts) or we see it (the new moon of Shawwal). I said: Is the sighting of the moon by Mu'awiya not valid for you? He said: No; this is how the Messenger of Allah (may peace be upon him) has commanded us. Yahya b. Yahya was in doubt (whether the word used in the narration by Kuraib) was Naktafi or Taktafi.
حَدَّثَنَا يَحْيَى بْنُ يَحْيَى، وَيَحْيَى بْنُ أَيُّوبَ، وَقُتَيْبَةُ، وَابْنُ، حُجْرٍ قَالَ يَحْيَى بْنُ يَحْيَى أَخْبَرَنَا وَقَالَ الآخَرُونَ، حَدَّثَنَا إِسْمَاعِيلُ، - وَهُوَ ابْنُ جَعْفَرٍ - عَنْ مُحَمَّدٍ، - وَهُوَ ابْنُ أَبِي حَرْمَلَةَ - عَنْ كُرَيْبٍ، أَنَّ أُمَّ الْفَضْلِ بِنْتَ الْحَارِثِ، بَعَثَتْهُ إِلَى مُعَاوِيَةَ بِالشَّامِ قَالَ فَقَدِمْتُ الشَّامَ فَقَضَيْتُ حَاجَتَهَا وَاسْتُهِلَّ عَلَىَّ رَمَضَانُ وَأَنَا بِالشَّامِ فَرَأَيْتُ الْهِلاَلَ لَيْلَةَ الْجُمُعَةِ ثُمَّ قَدِمْتُ الْمَدِينَةَ فِي آخِرِ الشَّهْرِ فَسَأَلَنِي عَبْدُ اللَّهِ بْنُ عَبَّاسٍ - رضى الله عنهما - ثُمَّ ذَكَرَ الْهِلاَلَ فَقَالَ مَتَى رَأَيْتُمُ الْهِلاَلَ فَقُلْتُ رَأَيْنَاهُ لَيْلَةَ الْجُمُعَةِ ‏.‏ فَقَالَ أَنْتَ رَأَيْتَهُ فَقُلْتُ نَعَمْ وَرَآهُ النَّاسُ وَصَامُوا وَصَامَ مُعَاوِيَةُ ‏.‏ فَقَالَ لَكِنَّا رَأَيْنَاهُ لَيْلَةَ السَّبْتِ فَلاَ نَزَالُ نَصُومُ حَتَّى نُكْمِلَ ثَلاَثِينَ أَوْ نَرَاهُ ‏.‏ فَقُلْتُ أَوَلاَ تَكْتَفِي بِرُؤْيَةِ مُعَاوِيَةَ وَصِيَامِهِ فَقَالَ لاَ هَكَذَا أَمَرَنَا رَسُولُ اللَّهِ صلى الله عليه وسلم ‏.‏ وَشَكَّ يَحْيَى بْنُ يَحْيَى فِي نَكْتَفِي أَوْ تَكْتَفِي ‏.‏
Reference : Sahih Muslim 1087
In-book reference : Book 13, Hadith 34
USC-MSA web (English) reference : Book 6, Hadith 2391
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Sahih Muslim 1125 a

'A'isha (Allah be pleased with her) reported that the Quraish used to fast on the day of 'Ashura in the pre-Islamic days and the Messenger of Allah (may peace be upon him) also observed it. When he migrated to Medina, he himself observed this fast and commanded (others) to observe it. But when fasting during the month of Ramadan was made obligatory he said:

He who wishes to observe this fast may do so, and he who wishes to abandon it may do so.
حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا جَرِيرٌ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، - رضى الله عنها - قَالَتْ كَانَتْ قُرَيْشٌ تَصُومُ عَاشُورَاءَ فِي الْجَاهِلِيَّةِ وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَصُومُهُ فَلَمَّا هَاجَرَ إِلَى الْمَدِينَةِ صَامَهُ وَأَمَرَ بِصِيَامِهِ فَلَمَّا فُرِضَ شَهْرُ رَمَضَانَ قَالَ ‏ "‏ مَنْ شَاءَ صَامَهُ وَمَنْ شَاءَ تَرَكَهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1125a
In-book reference : Book 13, Hadith 143
USC-MSA web (English) reference : Book 6, Hadith 2499
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Sahih Muslim 1161 c

Imran b. Husain (Allah be pleased with them) reported that Allah's Apostle (may peace be upon him) said to a person:

Did you observe any fast in the middle of this month (Sha'ban)? He said: No. Thereupon the Messenger of Allah (may peace be upon him) said: Fast for two days instead of (one fast) when you have completed (fasts of) Ramadan.
وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، عَنِ الْجُرَيْرِيِّ، عَنْ أَبِي، الْعَلاَءِ عَنْ مُطَرِّفٍ، عَنْ عِمْرَانَ بْنِ حُصَيْنٍ، - رضى الله عنهما - أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ لِرَجُلٍ ‏"‏ هَلْ صُمْتَ مِنْ سُرَرِ هَذَا الشَّهْرِ شَيْئًا ‏"‏ ‏.‏ قَالَ لاَ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ فَإِذَا أَفْطَرْتَ مِنْ رَمَضَانَ فَصُمْ يَوْمَيْنِ مَكَانَهُ ‏"‏ ‏.‏
Reference : Sahih Muslim 1161c
In-book reference : Book 13, Hadith 258
USC-MSA web (English) reference : Book 6, Hadith 2608
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Abu Hurairah (RAA) narrated, The Messenger of Allah (P.B.U.H.) forbade us from practicing wisal in fasting (i.e. fasting continuously without breaking one’s fast in the evening or eating before the following dawn). So a man said to him, ‘But you practice wisal O Messenger of Allah!’ The Prophet Allah (P.B.U.H.) replied, “Which one of you is like me? I am given food and drink during my sleep by Allah." So when people refused to stop wisal, the Prophet fasted day and night continuously along with them for a day and then another day and then they saw the crescent (of the new month of Shawwal). The Prophet said to them, "If the crescent had not appeared, I would have made you fast for a longer period." That was a punishment for them because they refused to stop (practicing Wisal). Agreed upon.
وَعَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: { نَهَى رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-عَنِ اَلْوِصَالِ, فَقَالَ رَجُلٌ مِنَ اَلْمُسْلِمِينَ: فَإِنَّكَ يَا رَسُولَ اَللَّهِ تُوَاصِلُ? قَالَ: " وَأَيُّكُمْ مِثْلِي? إِنِّي أَبِيتُ يُطْعِمُنِي رَبِّي وَيَسْقِينِي ".‏ فَلَمَّا أَبَوْا أَنْ يَنْتَهُوا عَنِ اَلْوِصَالِ وَاصَلَ بِهِمْ يَوْمًا, ثُمَّ يَوْمًا, ثُمَّ رَأَوُا اَلْهِلَالَ, فَقَالَ: " لَوْ تَأَخَّرَ اَلْهِلَالُ لَزِدْتُكُمْ " كَالْمُنَكِّلِ لَهُمْ حِينَ أَبَوْا أَنْ يَنْتَهُوا } مُتَّفَقٌ عَلَيْهِ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 13
English translation : Book 5, Hadith 683
Arabic reference : Book 5, Hadith 662
Jami` at-Tirmidhi 685
Abu Hurairah narrated that :
the Messenger of Allah said: "Do no precede the month of Ramadan by fasting a day or two before it, unless it is the case of a man who normally performs some fast, then let him fast it."
حَدَّثَنَا هَنَّادٌ، حَدَّثَنَا وَكِيعٌ، عَنْ عَلِيِّ بْنِ الْمُبَارَكِ، عَنْ يَحْيَى بْنِ أَبِي كَثِيرٍ، عَنْ أَبِي سَلَمَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ لاَ تَقَدَّمُوا شَهْرَ رَمَضَانَ بِصِيَامٍ قَبْلَهُ بِيَوْمٍ أَوْ يَوْمَيْنِ إِلاَّ أَنْ يَكُونَ رَجُلٌ كَانَ يَصُومُ صَوْمًا فَلْيَصُمْهُ ‏"‏ ‏.‏ قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏
Grade: Sahih (Darussalam)
Reference : Jami` at-Tirmidhi 685
In-book reference : Book 8, Hadith 4
English translation : Vol. 2, Book 3, Hadith 685
Sahih al-Bukhari 2045

Narrated `Amra bint `Abdur-Rahman from `Aisha:

Allah's Apostle mentioned that he would practice I`tikaf in the last ten days of Ramadan. `Aisha asked his permission to perform I`tikaf and he permitted her. Hafsa asked `Aisha to take his permission for her, and she did so. When Zainab bint Jahsh saw that, she ordered a tent to be pitched for her and it was pitched for her. Allah's Apostle used to proceed to his tent after the prayer. So, he saw the tents ans asked, "What is this?" He was told that those were the tents of Aisha, Hafsa, and Zainab. Allah's Apostle said, "Is it righteousness which they intended by doing so? I am not going to perform I`tikaf." So he returned home. When the fasting month was over, he performed Itikar for ten days in the month of Shawwal.

حَدَّثَنَا مُحَمَّدُ بْنُ مُقَاتِلٍ أَبُو الْحَسَنِ، أَخْبَرَنَا عَبْدُ اللَّهِ، أَخْبَرَنَا الأَوْزَاعِيُّ، قَالَ حَدَّثَنِي يَحْيَى بْنُ سَعِيدٍ، قَالَ حَدَّثَتْنِي عَمْرَةُ بِنْتُ عَبْدِ الرَّحْمَنِ، عَنْ عَائِشَةَ ـ رضى الله عنها ـ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم ذَكَرَ أَنْ يَعْتَكِفَ الْعَشْرَ الأَوَاخِرَ مِنْ رَمَضَانَ، فَاسْتَأْذَنَتْهُ عَائِشَةُ فَأَذِنَ لَهَا، وَسَأَلَتْ حَفْصَةُ عَائِشَةَ أَنْ تَسْتَأْذِنَ لَهَا فَفَعَلَتْ فَلَمَّا رَأَتْ ذَلِكَ زَيْنَبُ ابْنَةُ جَحْشٍ أَمَرَتْ بِبِنَاءٍ فَبُنِيَ لَهَا قَالَتْ وَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا صَلَّى انْصَرَفَ إِلَى بِنَائِهِ فَبَصُرَ بِالأَبْنِيَةِ فَقَالَ ‏"‏ مَا هَذَا ‏"‏‏.‏ قَالُوا بِنَاءُ عَائِشَةَ وَحَفْصَةَ وَزَيْنَبَ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ آلْبِرَّ أَرَدْنَ بِهَذَا مَا أَنَا بِمُعْتَكِفٍ ‏"‏‏.‏ فَرَجَعَ، فَلَمَّا أَفْطَرَ اعْتَكَفَ عَشْرًا مِنْ شَوَّالٍ‏.‏
Reference : Sahih al-Bukhari 2045
In-book reference : Book 33, Hadith 20
USC-MSA web (English) reference : Vol. 3, Book 33, Hadith 261
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'A’isha (RAA) narrated, ‘One day the Messenger of Allah (P.B.U.H.) entered my house and said, “ls there anything here (to eat)?" I said, ‘NO,’ He said, “I shall then be fasting (today)." Then he came to us another day and we said to him, 'Someone has offered us some hais as a gift.’ He then said, "Show it to me. I had been fasting since this morning, “and he ate from it ( as it was a voluntary fast and not during the obligatory fasting of Ramadan). Related by Muslim.
وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا قَالَتْ: { دَخَلَ عَلَيَّ اَلنَّبِيُّ ‏- صلى الله عليه وسلم ‏-ذَاتَ يَوْمٍ.‏ فَقَالَ: " هَلْ عِنْدَكُمْ شَيْءٌ? " قُلْنَا: لَا.‏ قَالَ: " فَإِنِّي إِذًا صَائِمٌ " ثُمَّ أَتَانَا يَوْمًا آخَرَ, فَقُلْنَا: أُهْدِيَ لَنَا حَيْسٌ, فَقَالَ: " أَرِينِيهِ, فَلَقَدْ أَصْبَحْتُ صَائِمًا " فَأَكَلَ } رَوَاهُ مُسْلِمٌ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 8
English translation : Book 5, Hadith 678
Arabic reference : Book 5, Hadith 657
Abu Hurairah (RAA) narrated that The Messenger of Allah (P.B.U.H.) said, "None of you should fast a day or two before the (beginning of the) mouth of Ramadan, unless it is a day on which one is in the habit of fasting (i.e. voluntary fasting that coincides with that day).” Agreed upon.
عَنْ أَبِي هُرَيْرَةَ ‏- رضى الله عنه ‏- قَالَ: قَالَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-{ لَا تَقَدَّمُوا رَمَضَانَ بِصَوْمِ يَوْمٍ وَلَا يَوْمَيْنِ, إِلَّا رَجُلٌ كَانَ يَصُومُ صَوْمًا, فَلْيَصُمْهُ } مُتَّفَقٌ عَلَيْهِ 1‏ .‏
Sunnah.com reference : Book 5, Hadith 1
English translation : Book 5, Hadith 671
Arabic reference : Book 5, Hadith 650