Romans 12:19-21

19 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."  20 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."

21 Don't be overcome by evil, but overcome evil with good.