In Context

16 These are they that were called of the congregation, the princes of the tribes of their fathers; they were the heads of the thousands of Israel.

17 And Moses and Aaron took these men which are expressed by name:

18 And they assembled all the congregation together on the first day of the second month, and they declared their pedigrees after their families, by their fathers' houses, according to the number of the names, from twenty years old and upward, by their polls.

19 As the LORD commanded Moses, so he numbered them in the wilderness of Sinai.

20 And the children of Reuben, Israel's firstborn, their generations, by their families, by their fathers' houses, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war;

21 those that were numbered of them, of the tribe of Reuben, were forty and six thousand and five hundred.

Numbers 1:19 in Other Translations