Numbers 1:19-21

New Revised Standard Version Catholic Edition

¹⁹ as the Lord commanded Moses. So he enrolled them in the wilderness of Sinai.

²⁰ The descendants of Reuben, Israel’s firstborn, their lineage, in their clans, by their ancestral houses, according to the number of names, individually, every male from twenty years old and upward, everyone able to go to war: ²¹ those enrolled of the tribe of Reuben were forty-six thousand five hundred.