Sahih Muslim 6464
صحيح مسلم#6464SahihAnas reported Allah's Messenger (ﷺ) established fraternity between the Quraish and the Ansar in his house at Medina
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 44:293