Every ass loves to hear himself bray

An illiterate king is a crowned ass

An ass may bray a good while before he shakes the stars down

Doth the wild ass bray when he hath grass? or loweth the ox over his fodder? / Can that which is unsavoury be eaten without salt? or is there any taste in the white of an egg? / The things that my soul refused to touch are as my sorrowful meat.

Can't tell his ass from a hole in the ground

Love teaches even asses to dance