Sahih al-Bukhari 5123
صحيح البخاري#5123SahihNarrated Zainab bint Salama:Um Habiba said to Allah's Messenger (ﷺ) "We have heard that you want to marry Durra bint Abu-Salama." Allah's Messenger (ﷺ) said, "Can she be married along with Um Salama (her mother)? Even if I have not married Um Salama, she would not be lawful for me to marry, for her father is my foster brother
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 67:59