Aflah, the brother of Abu Quays, used to seek permission to enter upon me, as he was my uncle through breastfeeding. I refused to grant him permission until the Messenger of Allah ﷺ came, and I informed him of this. He said, "Grant him permission, for he is your uncle."Ayesha said, "This was after the verse of the veil had been revealed."
أخبرنا هارون بن عبد الله أنبأنا معن قال حدثنا مالك عن ابن شهاب عن عروة
كان أفلح أخو أبي القعيس يستأذن علي وهو عمي من الرضاعة فأبيت أن آذن له حتى جاء رسول الله ﷺ فأخبرته فقال ائذني له فإنه عمك قالت عائشة وذلك بعد أن نزل الحجاب
Bukhari narrated it in the chapter on Marriage, section: the milk of the husband, hadith no. 5103, and Muslim in the chapter on Breastfeeding, section: prohibition of breastfeeding from the husband's milk, hadith no. 1445, from the hadith of Malik through this same chain, and it is found in the Muwatta (Yahya's recension) 2/602, and in al-Kubra, hadith no. 5472.