Numbers 1:2

1:2 “Take a census of the entire Israelite community by their clans and families, counting the name of every individual male.

Numbers 1:18

1:18 and they assembled the entire community together on the first day of the second month. Then the people recorded their ancestry by their clans and families, and the men who were twenty years old or older were listed by name individually,

Numbers 1:22

1:22 From the descendants of Simeon: According to the records of their clans and families, all the males numbered of them twenty years old or older who could serve in the army were listed by name individually.