en_tn_lite_do_not_use/gen/42/18.md

on the third day

The word "third" is an ordinal number. Alternate translation: "after the second day" (See: rc://en/ta/man/translate/translate-ordinal)

Do this and live

The understood information can be stated clearly. Alternate translation: "If you will do what I say, I will let you live" (See: rc://en/ta/man/translate/figs-ellipsis)

fear God

This refers to deeply respecting God and showing that respect by obeying him.