Numbers 1:16-18

New Revised Standard Version, Anglicised

¹⁶ These were the ones chosen from the congregation, the leaders of their ancestral tribes, the heads of the divisions of Israel.

¹⁷ Moses and Aaron took these men who had been designated by name, ¹⁸ and on the first day of the second month they assembled the whole congregation together. They registered themselves in their clans, by their ancestral houses, according to the number of names from twenty years old and upwards, individually,