Numbers 1:2-4

Young's Literal Translation

² `Take ye up the sum of all the company of the sons of Israel by their families, by the house of their fathers, in the number of names -- every male by their polls;

³ from a son of twenty years and upward, every one going out to the host in Israel, ye do number them by their hosts, thou and Aaron;

⁴ and with you there is a man for a tribe, each is a head to the house of his fathers.