“Marry my sister 'Azzah.” The Messenger of Allah said: 'Would you like that? “She said: “Yes, O Messenger of Allah. I am not the only one living with you and the one who most deserves to share good thingswith me is my sister.” The Messenger of Allah said: “But that is not permissible for me.” She said: “But we throught that you wanted to marry Durrah bint Abi Salmah.” The Messenger of Allah said: The daughter of Umm Salamah?” She said: “Yes” The Messenger of Allah said: “Even if she were not my step-daughter who is under my care, she would not be permissible for me, because she is the daughter of my brother through breastfeeding. Tuwaibah breastfed both her father and I. So do not offer your sisters and daughters to me for marriage.” (Using translation from Ibn Mājah 1939)
أَنَّ أُمَّ حَبِيبَةَ زَوْجَ النَّبِيِّ ﷺ أَخْبَرَتْهَا أَنَّهَا قَالَتْ لِرَسُولِ اللهِ ﷺ يَا رَسُولَ اللهِ انْكِحْ أُخْتِي ابْنَةَ أَبِي سُفْيَانَ فَزَعَمَتْ أَنَّ رَسُولَ اللهِ ﷺ قَالَ لَهَا أَوَ تُحِبِّينَ ذَلِكَ؟ قَالَتْ نَعَمْ يَا رَسُولَ اللهِ لَسْتُ لَكَ بِمُخْلِيَةٍ وَأَحَبُّ مَنْ شَرِكَنِي فِي خَيْرٍ أُخْتِي قَالَتْ فَقَالَ رَسُولُ اللهِ ﷺ إِنَّ ذَلِكَ لَا يَحِلُّ لِي فَقُلْتُ فَوَاللهِ يَا رَسُولَ اللهِ إِنَّا لَنَتَحَدَّثُ أَنَّكَ تُرِيدُ أَنْ تَنْكِحَ دُرَّةَ بِنْتَ أَبِي سَلَمَةَ فَقَالَ رَسُولُ اللهِ ﷺ ابْنَةَ أُمِّ سَلَمَةَ؟ قَالَتْ نَعَمْ قَالَ رَسُولُ اللهِ ﷺ وَايْمُ اللهِ إِنَّهَا لَوْ لَمْ تَكُنْ رَبِيبَتِي فِي حِجْرِي مَاحَلَّتْ لِي إِنَّهَا ابْنَةُ أَخِي مِنَ الرَّضَاعَةِ أَرْضَعَتْنِي وَأَبَا سَلَمَةَ ثُوَيْبَةُ فَلَا تَعْرِضْنَ عَلَيَّ بَنَاتِكُنَّ وَلَا أَخَوَاتِكُنَّ