Proverbs 25:18-22

Like a club and a sword and a piercing arrow Is a man who testifies falsely against his neighbor (acquaintance). Like a broken tooth or an unsteady foot Is confidence in an unfaithful man in time of trouble. Like one who takes off a garment in cold weather, or like [a reactive, useless mixture of] vinegar on soda, Is he who [thoughtlessly] sings [joyful] songs to a heavy heart. [Dan 6:18; Rom 12:15] If your enemy is hungry, give him bread to eat; And if he is thirsty, give him water to drink; [Matt 5:44; Rom 12:20] For in doing so, you will heap coals of fire upon his head, And the LORD will reward you.