Sahih Muslim 964
صحيح مسلم#964SahihAbu Huraira reported:The Messenger of Allah (ﷺ) said: Does the man who lifts his head before the Imam not fear that Allah may change his face into that of an ass?
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: 4:126