Sahih al-Bukhari 822
صحيح البخاري#822SahihNarrated Anas bin Malik:The Prophet (ﷺ) said, "Be straight in the prostrations and none of you should put his forearms on the ground (in the prostration) like a dog
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: 10:216