Sahih al-Bukhari 2644

Adam narrated to us: Shuʿba informed us: al-Hakam narrated to us, from ʿIrak ibn Malik, from ʿUrwa ibn al-Zubayr, from ʿAisha, may Allah be pleased with her, who said: Aflah asked permission to enter, but I did not permit him. He said: “Do you veil yourself from me when I am your paternal uncle?” I asked: “How is that?” He said: “My brother’s wife breastfed you with my brother’s milk.” She said: I asked the Messenger of Allah ﷺ about that, and he said: “Aflah is right; permit him.”