Numbers 1:17-19

New Catholic Bible

¹⁷ Moses and Aaron took the men who had been named ¹⁸ and on the first day of the second month they gathered together the entire community who registered themselves by families, by the name of their fathers’ households. The men twenty years and older were listed according to their names, one by one, ¹⁹ as the Lord had commanded Moses. And so he counted them in the Sinai Desert.