Numbers 1:2-4

Amplified Bible, Classic Edition

² Take a census of all the males of the congregation of the Israelites by families, by their fathers’ houses, according to the number of names, 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, company by company.

⁴ And with you there shall be a man [to assist you] from each tribe, each being the head of his father’s house.