Sahih al-Bukhari 7341
صحيح البخاري#7341SahihNarrated Anas:The Prophet (ﷺ) brought the Ansar and the Quraish people into alliance in my house at Medina, and he invoked Allah for one month against the tribe of Bani Sulaim in (the last rak`a of each compulsory) prayer
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: 96:69