Sahih al-Bukhari 783
صحيح البخاري#783SahihNarrated Abu Bakra:I reached the Prophet (ﷺ) in the mosque while he was bowing in prayer and I too bowed before joining the row. I mentioned it to the Prophet (ﷺ) and he said to me, "May Allah increase your love for the good. But do not repeat it again (bowing in that way)
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: 10:178