Sahih Bukhari Volume 7, Book 67, Hadith 5107

وَقَالَ لَنَا أَحْمَدُ بْنُ حَنْبَلٍ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ سُفْيَانَ، حَدَّثَنِي حَبِيبٌ، عَنْ سَعِيدٍ، عَنِ ابْنِ عَبَّاسٍ، حَرُمَ مِنَ النَّسَبِ سَبْعٌ، وَمِنَ الصِّهْرِ سَبْعٌ‏.‏ ثُمَّ قَرَأَ ‏{‏حُرِّمَتْ عَلَيْكُمْ أُمَّهَاتُكُمْ‏}‏ الآيَةَ‏.‏ وَجَمَعَ عَبْدُ اللَّهِ بْنُ جَعْفَرٍ بَيْنَ ابْنَةِ عَلِيٍّ وَامْرَأَةِ عَلِيٍّ‏.‏ وَقَالَ ابْنُ سِيرِينَ لاَ بَأْسَ بِهِ‏.‏ وَكَرِهَهُ الْحَسَنُ مَرَّةً ثُمَّ قَالَ لاَ بَأْسَ بِهِ‏.‏ وَجَمَعَ الْحَسَنُ بْنُ الْحَسَنِ بْنِ عَلِيٍّ بَيْنَ ابْنَتَىْ عَمٍّ فِي لَيْلَةٍ، وَكَرِهَهُ جَابِرُ بْنُ زَيْدٍ لِلْقَطِيعَةِ، وَلَيْسَ فِيهِ تَحْرِيمٌ لِقَوْلِهِ تَعَالَى ‏{‏وَأُحِلَّ لَكُمْ مَا وَرَاءَ ذَلِكُمْ‏}‏ وَقَالَ عِكْرِمَةُ عَنِ ابْنِ عَبَّاسٍ إِذَا زَنَى بِأُخْتِ امْرَأَتِهِ لَمْ تَحْرُمْ عَلَيْهِ امْرَأَتُهُ‏.‏ وَيُرْوَى عَنْ يَحْيَى الْكِنْدِيِّ عَنِ الشَّعْبِيِّ وَأَبِي جَعْفَرٍ، فِيمَنْ يَلْعَبُ بِالصَّبِيِّ إِنْ أَدْخَلَهُ فِيهِ، فَلاَ يَتَزَوَّجَنَّ أُمَّهُ، وَيَحْيَى هَذَا غَيْرُ مَعْرُوفٍ، لَمْ يُتَابَعْ عَلَيْهِ‏.‏ وَقَالَ عِكْرِمَةُ عَنِ ابْنِ عَبَّاسٍ إِذَا زَنَى بِهَا لَمْ تَحْرُمْ عَلَيْهِ امْرَأَتُهُ‏.‏ وَيُذْكَرُ عَنْ أَبِي نَصْرٍ أَنَّ ابْنَ عَبَّاسٍ حَرَّمَهُ‏.‏ وَأَبُو نَصْرٍ هَذَا لَمْ يُعْرَفْ بِسَمَاعِهِ مِنِ ابْنِ عَبَّاسٍ‏.‏ وَيُرْوَى عَنْ عِمْرَانَ بْنِ حُصَيْنٍ وَجَابِرِ بْنِ زَيْدٍ وَالْحَسَنِ وَبَعْضِ أَهْلِ الْعِرَاقِ تَحْرُمُ عَلَيْهِ‏.‏ وَقَالَ أَبُو هُرَيْرَةَ لاَ تَحْرُمُ حَتَّى يُلْزِقَ بِالأَرْضِ يَعْنِي يُجَامِعَ‏.‏ وَجَوَّزَهُ ابْنُ الْمُسَيَّبِ وَعُرْوَةُ وَالزُّهْرِيُّ‏.‏ وَقَالَ الزُّهْرِيُّ قَالَ عَلِيٌّ لاَ تَحْرُمُ‏.‏ وَهَذَا مُرْسَلٌ‏.

Ibn Abbas further said, "Seven types of marraiages are unlaful because of blood relations, and seven because of marriage relations." Then Ibn Abbas recited the Verse: "Forbidden to you(for marraige) are your mothers..."(V.4:33) 'Abdullah bin Ja'far married the daughter and wife of Ali at the same time(they were step-daughter and mother). Ibn Sirin said, "There is no harm in that." But Al-Hasan Al-Basri disapproved of it at first, but then said that there was no harm in it. Al-Hasan bin Al-Hasan bin Ali married two of his cousins in one night. Ja'far bin Zaid disapproved of that because it would bring about hatred (between the two cousins), but it is not unlawful, as Allah said, "Lawful to you are all others [beyond those(mentioned)]."(V.4:24) Ibn Abbas said," If somebody commits illegal sexual intercourse with his wife's sister., his wife does not become unlawful for him". And narrated Abu Ja'far, "If a person commits homosexuality with a boy, then the mother of that boy is unlawful for him to marry." Narrated Ibn Abbas, "If one commits illegal sexual intercourse with his mother-in-law , then his married relation to his wife does not become lawful." Abu Nasr is reported to have said that Ibn Abbas in the above case, regarded his marital relation to his wife unlawful, but Abu Nasr is not known well for hearing Hadith from Ibn Abbas. Imran bin Husain, Jabir bin Zaid, Al-Hasan and some other Iraqis, are reported to have judged that his marital relations to his wife would be lawful. In the above case Abu Huraira said, "The marital relation to one's wife does not become unlawful except if one has had sexual intercourse(with her mother)." Ibn Al-Musaiyab,'Urwa and Az-Zuhri allow such a person to keep his wife.'Ali said," His marital relations to his wife does not become unlawful."