Numbers 1:3

From twenty years old and upward, all that are able to go forth to war in Israel: thou and Aaron shall number them by their armies.

from twenty years old and upward, all who are able to go out to war in Israel. You and Aaron shall number them by their divisions.

from twenty years old and upward, all that are able to go forth to war in Israel, thou and Aaron shall number them by their hosts.

from a son of twenty years and upward, every one going out to the host in Israel, ye do number them by their hosts, thou and Aaron;

You and Aaron are to number those who are twenty years of age or older by their divisions—everyone who can serve in Israel’s army.