en_tn/pro/25/19.md

An unfaithful man in whom you trust in a time of trouble is like a bad tooth or a foot that slips

A foolish man is compared to a part of the body that causes trouble for a person. Alternate translation: "Trusting in an unfaithful man in time of trouble will bring you pain like a bad tooth or a foot that slips" (See: rc://en/ta/man/jit/figs-simile)