(25) باب النَّهْىِ عَنْ سَبْقِ الإِمَامِ، بِرُكُوعٍ أَوْ سُجُودٍ وَنَحْوِهِمَا
Abu Huraira reported:
The Messenger of Allah (ﷺ) said: Does the man who lifts his head ahead of the Imam (from prostration) not fear that Allah may change his head into the head of an ass? (ID)
Reference (ID): Sahih Muslim 427 a (ID)
In-book reference (ID): Book 4, Hadith 125 (ID)
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 859 (ID)