“Don't say, “I'll do to him just what he did to me! I'll get even with him!””

(Proverbs 24.29 GNB)

"If your enemy is hungry, give him bread to eat, and if he is thirsty, give him water to drink, for you will heap burning coals on his head, and the LORD will reward you."

(Proverbs 25.21-22 ESV)

“Beloved, never avenge yourselves, but leave it to the wrath of God, for it is written, “Vengeance is mine, I will repay, says the Lord.” To the contrary, “if your enemy is hungry, feed him; if he is thirsty, give him something to drink; for by so doing you will heap burning coals on his head.”

Do not be overcome by evil, but overcome evil with good.”

(Romans 12.19-21 ESV)

Not repay in kind, but repay with kindness.

See: Extend grace