Sahih Muslim 1057
صحيح مسلم#1057SahihAl-Bara' b. 'Azib reported:I noticed the prayer of Muhammad (ﷺ) and saw his Qiyam (standing), his bowing, and then going back to the standing posture after bowing, his prostration, his sitting between the two prostrations, and his prostration and sitting between salutation and going away, all these were nearly equal to one another
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: 4:219