Numbers 1:18-26
English Standard Version
Chapter 1
18and on the first day of the second month, they assembled the whole congregation together, who registered themselves by clans, by fathers ' houses, according to the number of names from twenty years old and upward, head by head, 19as the Lord commanded Moses. So he listed them in the wilderness of Sinai.
20The people of 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:
21those listed of the tribe of Reuben were 46,500.
22Of the people of Simeon, their generations, by their clans, by their fathers ' houses, those of them who were listed, 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:
23those listed of the tribe of Simeon were 59,300.