Aflah bin Abu al-Quays came in to visit me, and I veiled myself from him.He said, "You veil yourself from me when I am your uncle?"She said, I asked, "How is that?"He replied, "My brother's wife nursed you."She said, "It was the woman who nursed me, not the man."Then the Messenger of Allah ﷺ came in, and I told him what had happened.He said, "He is indeed your uncle, so let him come in to see you."
حدثنا محمد بن كثير العبدي أخبرنا سفيان عن هشام بن عروة عن عروة
دخل علي أفلح بن أبي القعيس فاستترت منه قال تستترين مني وأنا عمك قالت قلت من أين قال أرضعتك امرأة أخي قالت إنما أرضعتني المرأة ولم يرضعني الرجل فدخل علي رسول الله ﷺ فحدثته فقال إنه عمك فليلج عليك
Sourcing, [sahih] Reported by Bukhari, Marriage, chapter on what is permissible regarding entering upon and looking at women in cases of breastfeeding, no. 5239, and Muslim, Breastfeeding, chapter on the prohibition of breastfeeding through the man's water (i.e., milk kinship through the husband), no. 1445, from the hadith of Hisham bin Urwa through this same chain.