Sahih Muslim Book 35, Hadith Number 6581.

Chapter : The excellence of supplicating at the time of the crowing of the cock in the morning.

Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying. When you listen to the crowing of the cock, ask Allah for His favour as it sees Angels and when you listen to the braying of the donkey, seek refuge in Allah from the Satan for it sees Satan.