Proverbs 25:20-22 NIV

[20] Like one who takes away a garment on a cold day, or like vinegar poured on a wound, 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] In doing this, you will heap burning coals on his head, and the LORD will reward you.