Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: Whoever raises his head from prostration before the Imam, does he not fear that Allah may turn his head into the head of a donkey or transform his appearance into that of a donkey?
Hadith Referenceالمنتقى ابن الجارود / كتاب الصلاة / 325
Hadith Gradingغلام مصطفےٰ ظهير امن پوري:صحيح
Hadith Takhrijاز غلام مصطفےٰ ظهير امن پوري:«صحيح البخاري : 691 ، صحيح مسلم : 427»