Abu Hurairah reported the Messenger of Allah ﷺ as saying; Does he who raises his head while the Imam is prostrating not fear that Allah may change his head into a donkey’s or his face into a donkey’s face.
Hadith Referenceسنن ابي داود / كتاب الصلاة / 623
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم (427)