Sahih al-Bukhari 815
صحيح البخاري#815SahihNarrated Ibn `Abbas:The Prophet (ﷺ) was ordered to prostrate on seven bony parts and not to tuck up his clothes or hair
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 10:210