Sunan Abu Dawud
623
Sahih+3

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

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid