Sahih Muslim 1640
صحيح مسلم#1640SahihSuddi reported:I asked Anas how I should turn-to the right or to the left-when I say my prayers. He said: I have very often seen the Messenger of Allah (ﷺ) turning to the right
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: 6:71