Proverbs 25:21-22 Prov. 25:21-22
21 If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink: 22 For thou shalt heap coals of fire upon his head, and the LORD shall reward thee.
Romans 12:20 Rom. 12:20
Therefore if thine enemy hunger, feed him; if he thirst, give him drink: for in so doing thou shalt heap coals of fire on his head.