Numbers 26:1-2

Wycliffe Bible

26 After that the blood of (the) guilty men was shed out, the Lord said to Moses and to Eleazar, the priest, [the] son of Aaron,

² Reckon ye all the number of the sons of Israel, from twenty years and above (from twenty years of age and older), by their houses, and their kindreds, (yea,) all (the) men that be able to go forth to battles.