Proverbs 26:4–6 (ESV)
4 Answer not a fool according to his folly,
lest you be like him yourself.
5 Answer a fool according to his folly,
lest he be wise in his own eyes.
6 Whoever sends a message by the hand of a fool
cuts off his own feet and drinks violence.
Proverbs 26:12 (ESV)
12 Do you see a man who is wise in his own eyes?
There is more hope for a fool than for him.
Proverbs 26:16 (ESV)
16 The sluggard is wiser in his own eyes
than seven men who can answer sensibly.