Numbers 1:20-22

20 And they were as followeth The sons of Reuben, the firstborn of Israel, in their pedigrees by their families, by their ancestral houses, in the counting of names, by their polls, every male, from twenty years old and upwards, every one able to go forth to war;

21 such as were numbered of them as belonging to the tribe of Reuben, forty-six thousand and five hundred.

22 Of the sons of Simeon, in their pedigree by their families by their ancestral houses, such as were numbered of him, in the counting of names by their polls, every male from twenty years old and upwards, every one able to go forth to war;