Proverbs 26:6-9

He who sends a message by the hand of a fool Cuts off his own feet (sabotages himself) and drinks the violence [it brings on himself as a consequence]. [Prov 13:17] Like the legs which are useless to the lame, So is a proverb in the mouth of a fool [who cannot learn from its wisdom]. Like one who [absurdly] binds a stone in a sling [making it impossible to throw], So is he who [absurdly] gives honor to a fool. Like a thorn that goes [without being felt] into the hand of a drunken man, So is a proverb in the mouth of a fool [who remains unaffected by its wisdom].