Sahih Muslim Book - 17, Hadith - 3568

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى قَالَ قَرَأْتُ عَلَى مَالِكٍ عَنْ عَبْدِ اللَّهِ بْنِ أَبِى بَكْرٍ عَنْ عَمْرَةَ أَنَّ عَائِشَةَ أَخْبَرَتْهَا أَنَّ رَسُولَ اللَّهِ -صلى الله عليه وسلم- كَانَ عِنْدَهَا وَإِنَّهَا سَمِعَتْ صَوْتَ رَجُلٍ يَسْتَأْذِنُ فِى بَيْتِ حَفْصَةَ. قَالَتْ عَائِشَةُ فَقُلْتُ يَا رَسُولَ اللَّهِ هَذَا رَجُلٌ يَسْتَأْذِنُ فِى بَيْتِكَ. فَقَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « أُرَاهُ فُلاَنًا ». لِعَمِّ حَفْصَةَ مِنَ الرَّضَاعَةِ. فَقَالَتْ عَائِشَةُ يَا رَسُولَ اللَّهِ لَوْ كَانَ فُلاَنٌ حَيًّا - لِعَمِّهَا مِنَ الرَّضَاعَةِ - دَخَلَ عَلَىَّ قَالَ رَسُولُ اللَّهِ -صلى الله عليه وسلم- « نَعَمْ إِنَّ الرَّضَاعَةَ تُحَرِّمُ مَا تُحَرِّمُ الْوِلاَدَةُ ».

It was narrated from 'Amrah that 'Aishah told her, that the Messenger of Allah (s.a.w) was with her, and she heard the voice of a man asking permission to enter Hafsah's house. 'Aishah said: "I said: 'O Messenger of Allah, there is a man asking permission to enter your house.' The Messenger of Allah (s.a.w) said: 'I think it is so-and-so' - Hafsah's paternal uncle through breastfeeding. 'Aishah said: 'O Messenger of Allah, if so-and-so' - her paternal uncle through breastfeeding - were still alive, 'could he enter upon me?' The Messenger of Allah (s.a.w) said: 'Yes, for breastfeeding makes unlawful what birth makes unlawful."