Al-Lu'lu Wal-Marjan 917 — The Book of Ar-Rada' (Suckling foster relations)

A'isha Narrated from:

Aflah, brother of Abî Al-Qu'ais, asked permission to visit me after the order of Al-Hijâb was revealed. I said, "I will not permit him unless I take the permission of the Prophet ﷺ about him, for, it was not the brother of Abî Al-Qu'ais, but the wife of Abî Al-Qu'ais that nursed me."The Prophet ﷺ entered upon me, and I asked him, "O Allâh's Messenger! Aflah, the brother of Abî Al-Qu'ais asked the permission to visit me but I refused to permit him unless I took your permission." The Prophet ﷺ said, "What stopped you from permitting him? He is your uncle." I said, "O Allâh's Messenger! The man was not the person who had nursed me, but the woman, the wife of Abî Al-Qu'ais had nursed me." He said, "Admit him, for he is your uncle. Taribat Yaminuki (may your right hand be in dust)."( Sahîh Al-Bukhârî, Hadîth No. 319, Vol. 6)