Proverbs 25:19 in the King James Version
Confidence in an unfaithful man in time of trouble is like a broken tooth, and a foot out of joint.
Context
18 A man who gives false testimony against his neighbor is like a club, a sword, or a sharp arrow.
19 Confidence in someone unfaithful in time of trouble is like a bad tooth or a lame foot.
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.