(52) باب لَبَنِ الْفَحْلِ .
It was narrated that 'Aishah said:
"Aflah, the brother of Abu Al-Qu'ais, who was my paternal uncle through breast-feeding, used to ask permission to enter upon me, and I refused to let him in until the Messenger of Allah came, and I told him about that. He said: 'Let him in, for he is your paternal uncle.'" 'Aishah said: "That was after the (Verse of) Hijab had been revealed."
Reference: Sunan an-Nasa'i 3316
In-book reference: Book 26, Hadith 121
English translation: Vol. 4, Book 26, Hadith 3318