Romans 12:19-21
"Don't seek revenge yourselves, beloved, but give place to God's wrath. For it is written, "Vengeance belongs to me; I will repay, says the Lord." Therefore "If your enemy is hungry, feed him. If he is thirsty, give him a drink; for in doing so, you will heap coals of fire on his head." Don't be overcome by evil, but overcome evil with good."