Numbers 1:18-20

Revised Geneva Translation

¹⁸ And they called all the Congregation together on the first of the second month, who declared their kindred by their families, by the Houses of their fathers, according to the number of names, from twenty years old and above, man by man.

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

²⁰ So were the sons of Reuben, Israel’s eldest son, by their generations, by their families, by the Houses of their fathers, according to the number of names, man by man, every male from twenty years old and above, as many as went forth to war.