Messenger of Allah, marry my sister 'Azza, whereupon Messenger of Allah ﷺ said: Do you like it? She said: Yes, Messenger of Allah, I am not the exclusive wife of yours, and I wish that the person who joins me in good should be my sister. Thereupon Messenger of Allah ﷺ said: That is not lawful for me. I said: Messenger of Allah, we discussed that You intend to marry Durrah bint Abu Salama. He (the Holy Prophet) said: You mean the daughter of Abu Salama? She said: Yes, whereupon Messenger of Allah (may. peace be upon him) said: Even if she were not the step-daughter of mine, brought up under my guardianship, she would not have been lawful for me, for she is the daughter of my foster-brother. Thuwaiba gave me suck and to Abu Salama (also), so do not offer to me your daughters and sisters.
أَنَّ أُمَّ حَبِيبَةَ زَوْجَ النَّبِيِّ ﷺ حَدَّثَتْهَا أَنَّهَا قَالَتْ لِرَسُولِ اللَّهِ ﷺ يَا رَسُولَ اللَّهِ انْكِحْ أُخْتِي عَزَّةَ فَقَالَ رَسُولُ اللَّهِ ﷺ أَتُحِبِّينَ ذَلِكِ فَقَالَتْ نَعَمْ يَا رَسُولَ اللَّهِ لَسْتُ لَكَ بِمُخْلِيَةٍ وَأَحَبُّ مَنْ شَرِكَنِي فِي خَيْرٍ أُخْتِي فَقَالَ رَسُولُ اللَّهِ ﷺ فَإِنَّ ذَلِكِ لاَ يَحِلُّ لِي قَالَتْ فَقُلْتُ يَا رَسُولَ اللَّهِ فَإِنَّا نَتَحَدَّثُ أَنَّكَ تُرِيدُ أَنْ تَنْكِحَ دُرَّةَ بِنْتَ أَبِي سَلَمَةَ قَالَ بِنْتَ أَبِي سَلَمَةَ قَالَتْ نَعَمْ قَالَ رَسُولُ اللَّهِ ﷺ لَوْ أَنَّهَا لَمْ تَكُنْ رَبِيبَتِي فِي حَجْرِي مَا حَلَّتْ لِي إِنَّهَا ابْنَةُ أَخِي مِنَ الرَّضَاعَةِ أَرْضَعَتْنِي وَأَبَا سَلَمَةَ ثُوَيْبَةُ فَلاَ تَعْرِضْنَ عَلَىَّ بَنَاتِكُنَّ وَلاَ أَخَوَاتِكُنَّ