Narrated Abu Huraira: The Prophet said, "Isn't he who raises his head before the Imam afraid that Allah may transform his head into that of a donkey or his figure (face) into that of a donkey?"
Hadith Referenceصحيح البخاري / كتاب الأذان / 691
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة