Numbers 1:1-3

New Revised Standard Version, Anglicised Catholic Edition

The First Census of Israel

1 The Lord spoke to Moses in the wilderness of Sinai, in the tent of meeting, on the first day of the second month, in the second year after they had come out of the land of Egypt, saying: ² Take a census of the whole congregation of Israelites, in their clans, by ancestral houses, according to the number of names, every male individually; ³ from twenty years old and upwards, everyone in Israel able to go to war. You and Aaron shall enrol them, company by company.