to rise up early, to come home late

A person who works hard often has to wake up earlier in the morning and return home late at night.

eat the bread of hard work

This is an idiom. Bread often represents the food a person needs every day in order to live. Alternate translation: "work hard for your daily needs" (See: rc://en/ta/man/jit/figs-idiom and rc://en/ta/man/jit/figs-synecdoche)