Sahih Muslim 2139
صحيح مسلم#2139SahihAnas b. Malik reported Allah's Messenger (ﷺ) as saying:Endurance is to be shown at the first blow
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: 11:17