Proverbs 26:4-6

Amplified Bible

⁴
Do not answer [nor pretend to agree with the frivolous comments of] a [closed-minded] fool according to his folly,
Otherwise you, even you, will be like him.
⁵
Answer [and correct the erroneous concepts of] a fool according to his folly,
Otherwise he will be wise in his own eyes [if he thinks you agree with him].^(A)
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].^(B)