Salman bin Sakhr Al-Ansari - from Banu Bayadah - said that his wife was like the back of his mother to him until Ramadan passed. After half of Ramadan had passed he had intercourse with his wife during the night. So he went to the Messenger of Allah to mention that to him. The Messenger of Allah said to him: "Free a slave." He said: "I don't have one." So he said: "Then fast two consecutive months." He said: "I am unable." He said: "Feed sixty needy people." He said: "I can not." So the Messenger of Allah said to Farwah bin Amr: "Give him that Araq - and it is a large basket that holds fifteen or sixteen Sa - to feed sixty needy people."
حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، أَنْبَأَنَا هَارُونُ بْنُ إِسْمَاعِيلَ الْخَزَّازُ، أَنْبَأَنَا عَلِيُّ بْنُ الْمُبَارَكِ، أَنْبَأَنَا يَحْيَى بْنُ أَبِي كَثِيرٍ، أَنْبَأَنَا أَبُو سَلَمَةَ، وَمُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ بْنِ ثَوْبَانَ، أَنَّ سَلْمَانَ بْنَ صَخْرٍ الأَنْصَارِيَّ، أَحَدَ بَنِي بَيَاضَةَ جَعَلَ امْرَأَتَهُ عَلَيْهِ كَظَهْرِ أُمِّهِ حَتَّى يَمْضِيَ رَمَضَانُ فَلَمَّا مَضَى نِصْفٌ مِنْ رَمَضَانَ وَقَعَ عَلَيْهَا لَيْلاً فَأَتَى رَسُولَ اللَّهِ صلى الله عليه وسلم فَذَكَرَ ذَلِكَ لَهُ فَقَالَ لَهُ رَسُولُ اللَّهِ صلى الله عليه وسلم " أَعْتِقْ رَقَبَةً " . قَالَ لاَ أَجِدُهَا . قَالَ " فَصُمْ شَهْرَيْنِ مُتَتَابِعَيْنِ " . قَالَ لاَ أَسْتَطِيعُ . قَالَ " أَطْعِمْ سِتِّينَ مِسْكِينًا " . قَالَ لاَ أَجِدُ . فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم لِفَرْوَةَ بْنِ عَمْرٍو " أَعْطِهِ ذَلِكَ الْعَرَقَ " . وَهُوَ مِكْتَلٌ يَأْخُذُ خَمْسَةَ عَشَرَ صَاعًا أَوْ سِتَّةَ عَشَرَ صَاعًا فَقَالَ " أَطْعِمْ سِتِّينَ مِسْكِينًا " . قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ . يُقَالُ سَلْمَانُ بْنُ صَخْرٍ وَيُقَالُ سَلَمَةُ بْنُ صَخْرٍ الْبَيَاضِيُّ . وَالْعَمَلُ عَلَى هَذَا الْحَدِيثِ عِنْدَ أَهْلِ الْعِلْمِ فِي كَفَّارَةِ الظِّهَارِ .
Tirmizi
The Book on Divorce and Li'an • Hadith 1203