Proverbs 26:6-8

Amplified Bible

⁶ 
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].^(A)
7 
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].
⁸ 
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.