Sahih Muslim 1178
صحيح مسلم#1178SahihIbn 'Umar reported:As the people were praying at Quba' a man came to them and said: It has been revealed to file Messenger of Allah (ﷺ) during the night and he has been directed to turn towards the Ka'ba. So turn towards it. Their faces were towards Syria and they turned round towards Ka'ba
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: 5:18