Sahih Muslim 1100
صحيح مسلم#1100SahihIt was narrated from Al-'Abbas bin 'Abdul Muttalib that he heard the Messenger of Allah (ﷺ) say:"When a person prostates, he prostates on seven part of the body: His face, his hands, his knees and his feet
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: 4:262