Numbers 1:2-4

Revised Standard Version

² “Take a census of all the congregation of the people of Israel, by families, by fathers’ houses, according to the number of names, every male, head by head; ³ from twenty years old and upward, all in Israel who are able to go forth to war, you and Aaron shall number them, company by company. ⁴ And there shall be with you a man from each tribe, each man being the head of the house of his fathers.