en_tn/deu/19/21.md

Your eyes must not pity

Here "eyes" refer to the whole person. AT: "You must not pity him" or "You must not show him mercy" (See: rc://en/ta/man/translate/figs-synecdoche)

life will pay for life ... foot for foot

Here the phrases are shortened because the meaning is understood. It means the people must punish a person in the same way that he harmed another person. (See: rc://en/ta/man/translate/figs-ellipsis)