Proverbs 25:21 in the King James Version
If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Context
20 As one who takes away a garment in cold weather, or vinegar on soda, so is one who sings songs to a heavy heart.
21 If your enemy is hungry, give him food to eat. If he is thirsty, give him water to drink;
22 for you will heap coals of fire on his head, and the LORD will reward you.