Sa'id bin Abi Hilal سعيد بن أبي هلال الليثي · General Behavior (Kitab Al-Adab)

The Prophet (ﷺ) said: People who get up from an assembly in which they did not remember Allah will be just as if they had got up from an ass's corpse, and it will be a cause of grief to them.

when you hear the cocks crowing, ask Allah for some of His grace, for they have seen as angel; but when you hear an ass braying, seek refuge in Allah from the devil, for it has seen the devil.