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كتاب الصوم
30  
Fasting
(31)
Chapter: To feed family from sin expiation (kaffarah) if they are needy.
(31)
باب الْمُجَامِعِ فِي رَمَضَانَ هَلْ يُطْعِمُ أَهْلَهُ مِنَ الْكَفَّارَةِ إِذَا كَانُوا مَحَاوِيجَ
Sahih al-Bukhari 1937

Narrated Abu Huraira:

A man came to the Prophet (ﷺ) and said, "I had sexual intercourse with my wife on Ramadan (while fasting)." The Prophet (ﷺ) asked him, "Can you afford to manumit a slave?" He replied in the negative. The Prophet (ﷺ) asked him, "Can you fast for two successive months?" He replied in the negative. He asked him, "Can you afford to feed sixty poor persons?" He replied in the negative. (Abu Huraira added): Then a basket full of dates was brought to the Prophet (ﷺ) and he said (to that man), "Feed (poor people) with this by way of atonement." He said, "(Should I feed it) to poorer people than we? There is no poorer house than ours between its (Medina's) mountains." The Prophet (ﷺ) said, "Then feed your family with it."

حَدَّثَنَا عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنِ الزُّهْرِيِّ، عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ جَاءَ رَجُلٌ إِلَى النَّبِيِّ صلى الله عليه وسلم فَقَالَ إِنَّ الأَخِرَ وَقَعَ عَلَى امْرَأَتِهِ فِي رَمَضَانَ‏.‏ فَقَالَ ‏"‏ أَتَجِدُ مَا تُحَرِّرُ رَقَبَةً ‏"‏‏.‏ قَالَ لاَ‏.‏ قَالَ ‏"‏ فَتَسْتَطِيعُ أَنْ تَصُومَ شَهْرَيْنِ مُتَتَابِعَيْنِ ‏"‏‏.‏ قَالَ لاَ‏.‏ قَالَ ‏"‏ أَفَتَجِدُ مَا تُطْعِمُ بِهِ سِتِّينَ مِسْكِينًا ‏"‏‏.‏ قَالَ لاَ‏.‏ قَالَ فَأُتِيَ النَّبِيُّ صلى الله عليه وسلم بِعَرَقٍ فِيهِ تَمْرٌ ـ وَهُوَ الزَّبِيلُ ـ قَالَ ‏"‏ أَطْعِمْ هَذَا عَنْكَ ‏"‏‏.‏ قَالَ عَلَى أَحْوَجَ مِنَّا مَا بَيْنَ لاَبَتَيْهَا أَهْلُ بَيْتٍ أَحْوَجُ مِنَّا‏.‏ قَالَ ‏"‏ فَأَطْعِمْهُ أَهْلَكَ ‏"‏‏.‏
Reference : Sahih al-Bukhari 1937
In-book reference : Book 30, Hadith 44
USC-MSA web (English) reference : Vol. 3, Book 31, Hadith 158
  (deprecated numbering scheme)