وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ غَيْرِ، وَاحِدٍ، أَنَّ عَبْدَ اللَّهِ بْنَ مَسْعُودٍ، اسْتُفْتِيَ وَهُوَ بِالْكُوفَةِ عَنْ نِكَاحِ الأُمِّ، بَعْدَ الاِبْنَةِ إِذَا لَمْ تَكُنْ الاِبْنَةُ مُسَّتْ فَأَرْخَصَ فِي ذَلِكَ ثُمَّ إِنَّ ابْنَ مَسْعُودٍ قَدِمَ الْمَدِينَةَ فَسَأَلَ عَنْ ذَلِكَ فَأُخْبِرَ أَنَّهُ لَيْسَ كَمَا قَالَ وَإِنَّمَا الشَّرْطُ فِي الرَّبَائِبِ فَرَجَعَ ابْنُ مَسْعُودٍ إِلَى الْكُوفَةِ فَلَمْ يَصِلْ إِلَى مَنْزِلِهِ حَتَّى أَتَى الرَّجُلَ الَّذِي أَفْتَاهُ بِذَلِكَ فَأَمَرَهُ أَنْ يُفَارِقَ امْرَأَتَهُ . قَالَ مَالِكٌ فِي الرَّجُلِ تَكُونُ تَحْتَهُ الْمَرْأَةُ ثُمَّ يَنْكِحُ أُمَّهَا فَيُصِيبُهَا إِنَّهَا تَحْرُمُ عَلَيْهِ امْرَأَتُهُ وَيُفَارِقُهُمَا جَمِيعًا وَيَحْرُمَانِ عَلَيْهِ أَبَدًا إِذَا كَانَ قَدْ أَصَابَ الأُمَّ فَإِنْ لَمْ يُصِبِ الأُمَّ لَمْ تَحْرُمْ عَلَيْهِ امْرَأَتُهُ وَفَارَقَ الأُمَّ . وَقَالَ مَالِكٌ فِي الرَّجُلِ يَتَزَوَّجُ الْمَرْأَةَ ثُمَّ يَنْكِحُ أُمَّهَا فَيُصِيبُهَا إِنَّهُ لاَ تَحِلُّ لَهُ أُمُّهَا أَبَدًا وَلاَ تَحِلُّ لأَبِيهِ وَلاَ لاِبْنِهِ وَلاَ تَحِلُّ لَهُ ابْنَتُهَا وَتَحْرُمُ عَلَيْهِ امْرَأَتُهُ . قَالَ مَالِكٌ فَأَمَّا الزِّنَا فَإِنَّهُ لاَ يُحَرِّمُ شَيْئًا مِنْ ذَلِكَ لأَنَّ اللَّهَ تَبَارَكَ وَتَعَالَى قَالَ {وَأُمَّهَاتُ نِسَائِكُمْ} فَإِنَّمَا حَرَّمَ مَا كَانَ تَزْوِيجًا وَلَمْ يَذْكُرْ تَحْرِيمَ الزِّنَا فَكُلُّ تَزْوِيجٍ كَانَ عَلَى وَجْهِ الْحَلاَلِ يُصِيبُ صَاحِبُهُ امْرَأَتَهُ فَهُوَ بِمَنْزِلَةِ التَّزْوِيجِ الْحَلاَلِ فَهَذَا الَّذِي سَمِعْتُ وَالَّذِي عَلَيْهِ أَمْرُ النَّاسِ عِنْدَنَا .
Yahya related to me from Malik from more than one source thatwhen Abdullah ibn Masud was in Kufa, he was asked for an opinion aboutmarrying the mother after marrying the daughter when the marriage withthe daughter had not been consummated. He permitted it. When Ibn Masudcame to Madina, he asked about it and was told that it was not as hehad said, and that this condition referred to foster-mothers. IbnMasud returnedto Kufa,and he had just reached his dwelling when theman who had asked him for the opinion came to visit and he ordered himto separate from his wife. Malik said that if a man marriedthe mother of a woman who was his wife and he had sexual relationswith the mother then his wife was haram for him, and he had toseparate from both of them. They were both haram to him forever, if hehad had sexual relations with the mother. If he had not had relationswith the mcther, his wife was not haram for him, and he separated fromthe mother. Malik explained further about the man who marrieda woman, and then married her mother and cohabited with her, "Themother will never be halal for him, and she is not halal for hisfather or his son, and any daughters of hers are not halal for him andso his wife is haram for him." Malik said, "Fornicationhowever, does not make any of that haram because Allah, the Blessed,the Exalted, mentioned 'the mothers of your wives,' as one whommarriage made haram, and he didn't mention the making haram byfornication. Every marriage in a halal manner in which a man cohabitswith his wife, is a halal marriage. This is what I have heard, andthis is how things are done among us." Translation Not Available
Book Ref: Muwatta Imam Malik Book 28 Hadith 1117
Web Ref: Muwatta Imam Malik Book 28 Hadith 23