كتاب الرضاع
17  
The Book of Suckling
(2)
Chapter: The prohibition that results from breastfeeding is related to the issue of the male
(2)
باب تَحْرِيمِ الرَّضَاعَةِ مِنْ مَاءِ الْفَحْلِ ‏
Sahih Muslim 1445 d

This hadith has been narrated on the authority of Zuhri with the same chain of transmitters (that 'A'isha said):

There came Aflah, the brother of Abu'l Qulais (Allah be pleased with him), and sought permission from her, the rest of the hadith is the same (except for the words that the Holy Prophet) said:" He is your uncle. Let your hand be besmeared with dust. Abu'l Qulais was the husband of the woman who had suckled 'A'isha (Allah be pleased with her).
وَحَدَّثَنَاهُ عَبْدُ بْنُ حُمَيْدٍ، أَخْبَرَنَا عَبْدُ الرَّزَّاقِ، أَخْبَرَنَا مَعْمَرٌ، عَنِ الزُّهْرِيِّ، بِهَذَا الإِسْنَادِ جَاءَ أَفْلَحُ أَخُو أَبِي الْقُعَيْسِ يَسْتَأْذِنُ عَلَيْهَا ‏.‏ بِنَحْوِ حَدِيثِهِمْ وَفِيهِ ‏ "‏ فَإِنَّهُ عَمُّكِ تَرِبَتْ يَمِينُكِ ‏"‏ ‏.‏ وَكَانَ أَبُو الْقُعَيْسِ زَوْجَ الْمَرْأَةِ الَّتِي أَرْضَعَتْ عَائِشَةَ ‏.‏
Reference : Sahih Muslim 1445d
In-book reference : Book 17, Hadith 7
USC-MSA web (English) reference : Book 8, Hadith 3400
  (deprecated numbering scheme)