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.

The month most liked by the Messenger of Allah (saws) for fasting was Sha'ban. He then joined it with Ramadan.

The Prophet (saws) said: No sadaqah is due on a horse or a slave except that given at the breaking of the fast (at the end of Ramadan).

One day while Allah's Apostle was sitting with the people, a man came to him walking and said, "O Allah's Apostle. What is Belief?" The Prophet said, "Belief is to believe in Allah, His Angels, His Books, His Apostles, and the meeting with Him, and to believe in the Resurrection." The man asked, "O Allah's Apostle What is Islam?" The Prophet replied, "Islam is to worship Allah and not worship anything besides Him, to offer prayers perfectly, to pay the (compulsory) charity i.e. Zakat and to fast the month of Ramadan." The man again asked, "O Allah's Apostle What is Ihsan (i.e. perfection or Benevolence)?" The Prophet said, "Ihsan is to worship Allah as if you see Him, and if you do not achieve this state of devotion, then (take it for granted that) Allah sees you." The man further asked, "O Allah's Apostle When will the Hour be established?" The Prophet replied, "The one who is asked about it does not know more than the questioner does, but I will describe to you its portents. When the lady slave gives birth to her mistress, that will be of its portents; when the bare-footed naked people become the chiefs of the people, that will be of its portents. The Hour is one of five things which nobody knows except Allah. Verily, the knowledge of the Hour is with Allah (alone). He sends down the rain, and knows that which is in the wombs." (31.34) Then the man left. The Prophet said, "Call him back to me." They went to call him back but could not see him. The Prophet said, "That was Gabriel who came to teach the people their religion." (See Hadith No. 47 Vol 1)

She never saw the Prophet (saws) fasting the whole month except Sha'ban which he combined with Ramadan.

The Messenger of Allah (saws) invited me to a meal shortly before dawn in Ramadan saying: Come to the blessed morning meal.

The Prophet (saws) said: If anyone breaks his fast one day in Ramadan without a concession granted to him by Allah, a perpetual fast will not atone for it.

The Messenger of Allah (saws) said to us: Seek it (laylat al-Qadr) on the seventeenth night of Ramadan, and on the twenty first night, and on the twenty-third night. He then kept silence.

While we were sitting with the Prophet in the mosque, a man came riding on a camel. He made his camel kneel down in the mosque, tied its foreleg and then said: "Who amongst you is Muhammad?" At that time the Prophet was sitting amongst us (his companions) leaning on his arm. We replied, "This white man reclining on his arm." The man then addressed him, "O Son of `Abdul Muttalib." The Prophet said, "I am here to answer your questions." The man said to the Prophet, "I want to ask you something and will be hard in questioning. So do not get angry." The Prophet said, "Ask whatever you want." The man said, "I ask you by your Lord, and the Lord of those who were before you, has Allah sent you as an Apostle to all the mankind?" The Prophet replied, "By Allah, yes." The man further said, "I ask you by Allah. Has Allah ordered you to offer five prayers in a day and night (24 hours).? He replied, "By Allah, Yes." The man further said, "I ask you by Allah! Has Allah ordered you to observe fasts during this month of the year (i.e. Ramadan)?" He replied, "By Allah, Yes." The man further said, "I ask you by Allah. Has Allah ordered you to take Zakat (obligatory charity) from our rich people and distribute it amongst our poor people?" The Prophet replied, "By Allah, yes." Thereupon that man said, "I have believed in all that with which you have been sent, and I have been sent by my people as a messenger, and I am Dimam bin Tha`laba from the brothers of Bani Sa`d bin Bakr."

I was an interpreter between the people and Ibn `Abbas. Once Ibn `Abbas said that a delegation of the tribe of `Abdul Qais came to the Prophet who asked them, "Who are the people (i.e. you)? (Or) who are the delegates?" They replied, "We are from the tribe of Rabi`a." Then the Prophet said to them, "Welcome, O people (or said, "O delegation (of `Abdul Qais).") Neither will you have disgrace nor will you regret." They said, "We have come to you from a distant place and there is the tribe of the infidels of Mudar intervening between you and us and we cannot come to you except in the sacred month. So please order us to do something good (religious deeds) and that we may also inform our people whom we have left behind (at home) and that we may enter Paradise (by acting on them.)" The Prophet ordered them to do four things, and forbade them from four things. He ordered them to believe in Allah Alone, the Honorable the Majestic and said to them, "Do you know what is meant by believing in Allah Alone?" They replied, "Allah and His Apostle know better." Thereupon the Prophet said, "(That means to testify that none has the right to be worshipped but Allah and that Muhammad is His Apostle, to offer prayers perfectly, to pay Zakat, to observe fasts during the month of Ramadan, (and) to pay Al-Khumus (one fifth of the booty to be given in Allah's cause)." Then he forbade them four things, namely Ad-Dubba.' Hantam, Muzaffat (and) An-Naqir or Muqaiyar (These were the names of pots in which alcoholic drinks used to be prepared). The Prophet further said, "Memorize them (these instructions) and tell them to the people whom you have left behind."

The Prophet (saws) said: Do not fast (for Ramadan) before the coming of the month until you sight the moon or complete the number (of thirty days); then fast until you sight the moon or complete the number (of thirty days).

Al-Hasan reported: Umar ibn al-Khattab gathered the people (in tarawih prayer) behind Ubayy ibn Ka'b (who led them). He used to lead them for twenty days (during Ramadan, and would not recite the supplication except in the second half of it (i.e. Ramadan). When the last ten days remained, he kept away from them, and prayed in his house. They used to say: Ubayy ran away.

Abu Dawud said: This tradition shows that whatever has been reported about the recitation of the supplication is not tenable. Moreover, these two traditions from Ubayy b. Ka'b indicate that another tradition which tells that the Prophet (saws) recited the supplication in the witr is weak.

The Prophet (saws) used to observe i'tikaf during the last ten days of Ramadan. One year he did not observe i'tikaf. When the next year came, he observed i'tikaf for twenty nights (i.e. days).

The Messenger of Allah (saws) prescribed this sadaqah as one sa' of dried dates or barley, or half a sa' of wheat payable by every freeman or slave, male or female, young or old. When Ali came (to Basrah), he found that price had come down. He said: Allah has given prosperity to you, so give one sa' of everything (as sadaqah).

The narrator Humayd said: Al-Hasan maintained that the sadaqah at the end of Ramadan was due on a person who fasted.

The Messenger of Allah (saws) used to count the days in Sha'ban in a manner he did not count any other month; then he fasted when he sighted the new moon of Ramadan; but if the weather was cloudy he counted thirty days and then fasted.

The Messenger of Allah (saws) said: If anyone has a riding beast which carries him to where he can get sufficient food, he should keep the fast of Ramadan wherever he is when it comes.

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.