Numbers 1:19-21

English Standard Version

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

²⁰ The people of ^(A)Reuben, Israel's firstborn, their generations, by their clans, by their fathers' houses, according to the number of names, head by head, every male from twenty years old and upward, all who were able to go to war: ²¹ those listed of the tribe of Reuben were ^(B)46,500.