RobH_en_tn/num/27/13.md

you, too, must be gathered to your people

This is a euphemism that means Moses will die and his spirit will go to the place where his ancestors are. Alternate translation: "you must die" (See: rc://en/ta/man/translate/figs-euphemism)

like Aaron your brother

You can make clear the understood information that Aaron died. Alternate translation: "like your older brother Aaron died" (See: rc://en/ta/man/translate/figs-ellipsis)