Proverbs 25:4-5; Proverbs 25:21-22
Remove the dross from the silver, and out comes material for the silversmith;
remove the wicked from the king's presence, and his throne will be established through righteousness.
If your enemy is hungry, give him food to eat; if he is thirsty, give him water to drink.
In doing this, you will heap burning coals on his head, and the LORD will reward you.