Numbers 1:1-3

A Census of Israel's Warriors

1 The LORD spoke to Moses 1in the wilderness of Sinai, 2in 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 3"Take a census of all the congregation of the people of Israel, by clans, 4by fathers' houses, according to the number of names, every male, head by head.
3 5From twenty years old and upward, all in Israel who are able to go to war, you and Aaron shall list them, 6company by company.