Numbers 1:16-18

King James Version

¹⁶ These were the renowned of the congregation, princes of the tribes of their fathers, heads of thousands in Israel.

¹⁷ And Moses and Aaron took these men which are expressed by their names:

¹⁸ And they assembled all the congregation together on the first day of the second month, and they declared their pedigrees after their families, by the house of their fathers, according to the number of the names, from twenty years old and upward, by their polls.