Ayesha reported,

Aflah, the brother of Abu Quays, came seeking permission to enter upon her. He was her uncle through breastfeeding, and this was after the verse of the veil had been revealed. She refused to grant him permission. When the Messenger of Allah ﷺ came, she informed him of what she had done, and he instructed her to grant him permission to enter.

Bukhari 5103

Sahih

حدثنا عبد الله بن يوسف أخبرنا مالك عن ابن شهاب عن عروة بن الزبير

عن عائشة

أن أفلح أخا أبي القعيس جاء يستأذن عليها وهو عمها من الرضاعة بعد أن نزل الحجاب فأبيت أن آذن له فلما جاء رسول الله ﷺ أخبرته بالذي صنعت فأمرني أن آذن له

البخاري 5103صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Marriage
Chapter
Milk kinship through the husband
Numbering
Darussalam 5103
Bukhari 5103