Proverbs 25:18-20

Amplified Bible

¹⁸ 
Like a club and a sword and a piercing arrow
Is a man who testifies falsely against his neighbor (acquaintance).
¹⁹ 
Like a broken tooth or an unsteady foot
Is confidence in an unfaithful man in time of trouble.
²⁰ 
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.^(A)