(the wife of the Prophet) that while Messenger of Allah ﷺ was with her, she heard a voice of a man asking permission to enter the house of Hafsa. ʿAisha added: I said, "O Messenger of Allah ﷺ! This man is asking permission to enter your house." The Prophet ﷺ said, "I think he is so-and-so," naming the foster-uncle of Hafsa. ʿAisha said, "If so-and-so," naming her foster uncle, "were living, could he enter upon me?" The Prophet ﷺ said, "Yes, for foster suckling relations make all those things unlawful which are unlawful through corresponding birth (blood) relations."  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ عِنْدَهَا وَأَنَّهَا سَمِعَتْ صَوْتَ رَجُلٍ يَسْتَأْذِنُ فِي بَيْتِ حَفْصَةَ قَالَتْ فَقُلْتُ يَا رَسُولَ اللَّهِ هَذَا رَجُلٌ يَسْتَأْذِنُ فِي بَيْتِكَ فَقَالَ النَّبِيُّ ﷺ أُرَاهُ فُلاَنًا لِعَمِّ حَفْصَةَ مِنَ الرَّضَاعَةِ قَالَتْ عَائِشَةُ لَوْ كَانَ فُلاَنٌ حَيًّا لِعَمِّهَا مِنَ الرَّضَاعَةِ دَخَلَ عَلَىَّ فَقَالَ نَعَمِ الرَّضَاعَةُ تُحَرِّمُ مَا تُحَرِّمُ الْوِلاَدَةُ  

It was said to the Prophet, "Won't you marry the daughter of Hamza?" He said, "She is my foster niece (brother's daughter). "  

قِيلَ لِلنَّبِيِّ ﷺ أَلاَ تَزَوَّجُ ابْنَةَ حَمْزَةَ قَالَ إِنَّهَا ابْنَةُ أَخِي مِنَ الرَّضَاعَةِ وَقَالَ بِشْرُ بْنُ عُمَرَ حَدَّثَنَا شُعْبَةُ سَمِعْتُ قَتَادَةَ سَمِعْتُ جَابِرَ بْنَ زَيْدٍ مِثْلَهُ  

(daughter of Abu Sufyan) I said, "O Messenger of Allah ﷺ! Marry my sister. the daughter of Abu Sufyan." The Prophet ﷺ said, "Do you like that?" I replied, "Yes, for even now I am not your only wife and I like that my sister should share the good with me." The Prophet ﷺ said, "But that is not lawful for me." I said, We have heard that you want to marry the daughter of Abu Salama." He said, "(You mean) the daughter of Um Salama?" I said, "Yes." He said, "Even if she were not my step-daughter, she would be unlawful for me to marry as she is my foster niece. I and Abu Salama were suckled by Thuwaiba. So you should not present to me your daughters or your sisters (in marriage)." Narrated 'Urwa: Thuwaiba was the freed slave girl of Abu Lahb whom he had manumitted, and then she suckled the Prophet. When Abu Lahb died, one of his relatives saw him in a dream in a very bad state and asked him, "What have you encountered?" Abu Lahb said, "I have not found any rest since I left you, except that I have been given water to drink in this (the space between his thumb and other fingers) and that is because of my manumitting Thuwaiba."  

أَنَّ أُمَّ حَبِيبَةَ بِنْتَ أَبِي سُفْيَانَ أَخْبَرَتْهَا أَنَّهَا قَالَتْ يَا رَسُولَ اللَّهِ انْكِحْ أُخْتِي بِنْتَ أَبِي سُفْيَانَ فَقَالَ أَوَتُحِبِّينَ ذَلِكَ فَقُلْتُ نَعَمْ لَسْتُ لَكَ بِمُخْلِيَةٍ وَأَحَبُّ مَنْ شَارَكَنِي فِي خَيْرٍ أُخْتِي فَقَالَ النَّبِيُّ ﷺ إِنَّ ذَلِكَ لاَ يَحِلُّ لِي قُلْتُ فَإِنَّا نُحَدَّثُ أَنَّكَ تُرِيدُ أَنْ تَنْكِحَ بِنْتَ أَبِي سَلَمَةَ قَالَ بِنْتَ أُمِّ سَلَمَةَ قُلْتُ نَعَمْ فَقَالَ لَوْ أَنَّهَا لَمْ تَكُنْ رَبِيبَتِي فِي حَجْرِي مَا حَلَّتْ لِي إِنَّهَا لاَبْنَةُ أَخِي مِنَ الرَّضَاعَةِ أَرْضَعَتْنِي وَأَبَا سَلَمَةَ ثُوَيْبَةُ فَلاَ تَعْرِضْنَ عَلَىَّ بَنَاتِكُنَّ وَلاَ أَخَوَاتِكُنَّ قَالَ عُرْوَةُ وَثُوَيْبَةُ مَوْلاَةٌ لأَبِي لَهَبٍ كَانَ أَبُو لَهَبٍ أَعْتَقَهَا فَأَرْضَعَتِ النَّبِيَّ ﷺ فَلَمَّا مَاتَ أَبُو لَهَبٍ أُرِيَهُ بَعْضُ أَهْلِهِ بِشَرِّ حِيبَةٍ قَالَ لَهُ مَاذَا لَقِيتَ قَالَ أَبُو لَهَبٍ لَمْ أَلْقَ بَعْدَكُمْ غَيْرَ أَنِّي سُقِيتُ فِي هَذِهِ بِعَتَاقَتِي ثُوَيْبَةَ