(2) باب تَحْرِيمِ الرَّضَاعَةِ مِنْ مَاءِ الْفَحْلِ
'A'isha (Allah be pleased with her) reported:
Aflah b. Qu'ais sought permission from me (to enter the house), but I refused to grant him the permission, and he sent me (the message saying): I am your uncle (in the sense) that the wife of my brother has suckled you, (but still) I refused to grant him permission. There came the Messenger of Allah (ﷺ) and I made a mention of it to him, and he said: He can enter (your house), for he is your uncle.
Reference: Sahih Muslim 1445 j
In-book reference: Book 17, Hadith 13
USC-MSA web (English) reference(deprecated numbering scheme): Book 8, Hadith 3406