Numbers 1:18-20

Christian Standard Bible

¹⁸ and they assembled the whole community on the first day of the second month. They recorded their ancestry by their clans and their ancestral families, counting one by one the names of those twenty years old or more, ¹⁹ just as the Lord commanded Moses. He registered them in the Wilderness of Sinai:

²⁰ The descendants of Reuben,^(A) the firstborn of Israel: according to their family records by their clans and their ancestral families, counting one by one the names of every male twenty years old or more, everyone who could serve in the army,