Khalaf ibn Hisham, Abu al-Rabi' al-Zahrani, and Qutaybah ibn Sa'id narrated to us—all of them from Hammad. Khalaf said: Hammad ibn Zayd narrated to us, from Muhammad ibn Ziyad, who said: Abu Hurayrah narrated to us, who said: Muhammad, peace be upon him, said: "Does not the one who raises his head before the imam fear that Allah will transform his head into the head of a donkey?"