Proverbs 29:9

⁷ The righteous consider the cause of the poor, but the wicked have no regard for such concerns.

⁸ Mockers inflame a city, but the wise turn away anger.

If a wise man goes to court with a fool, there will be raving and laughing with no resolution.

¹⁰ Men of bloodshed hate a blameless man, but the upright care for his life.

¹¹ A fool vents all his anger, but a wise man holds it back.

Do read the surrounding verses too, because the context often says more than a single verse.

Compare

BSB: If a wise man goes to court with a fool, there will be raving and laughing with no resolution.
KJV: If a wise man contendeth with a foolish man, whether he rage or laugh, there is no rest.
WEB: If a wise man goes to court with a foolish man, the fool rages or scoffs, and there is no peace.
ASV: If a wise man hath a controversy with a foolish man, Whether he be angry or laugh, there will be no rest.
DARBY: If a wise man contendeth with a fool, whether he rage or laugh, [he] hath no rest.
BLB: A wise man enters into judgment with a foolish man, and he trembles and laughs, and [there is] no rest.

ÅB: Når en vismann går i rette med en dåre, så blir dåren vred og ler, og der blir ingen ro.
OTB: Når en vis person engasjerer seg i en tvist med en dåre, raser eller håner dåren, og det er ingen fred.
B1930: Når en vismann går i rette med en dåre, så blir dåren vred og ler, og der blir ingen ro.

Proverbs 26:4
Do not answer a fool according to his folly, or you yourself will be like him.
Read in context
Ecclesiastes 10:13
The beginning of his talk is folly, and the end of his speech is evil madness.
Read in context
Matthew 7:6
Do not give dogs what is holy; do not throw your pearls before swine. If you do, they may trample them under their feet, and then turn and tear you to pieces.
Read in context
Matthew 11:17–19
‘We played the flute for you, and you did not dance; we sang a dirge, and you did not mourn.’
Read in context