Sahih Muslim 1612
صحيح مسلم#1612SahihIbn 'Umar reported that the Messenger of Allah (ﷺ) used to say prayer on his camel while coming from Mecca to Medina, in whatever direction his face had turned; and its was (in this context) that this verse was revealed:" So whether you turn thither is Allah's face" (ii)
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: 6:43