Numbers 1:19

¹⁷And Moses and Aaron took these men who were called by name.

¹⁸And they assembled all the congregation on the first day of the month in the second year; and they registered them after their lineage, after their families, after the number of their names, from twenty years old and upward, every male according to their number:

— Numbers 1:19 —

²⁰And the sons of Reuben the firstborn of Israel according to their kindred, according to their divisions, according to the houses of their families, according to the number of their names, according to their heads, were—all males from twenty years old and upward, everyone that went out with the host—

²¹the numbering of them of the tribe of Reuben, was forty-six thousand and four hundred.