Numbers 1:19-21

Christian Standard Bible

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, ²¹ those registered for the tribe of Reuben numbered 46,500.