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 4:2

4:2 “Take a census of the Kohathites from among the Levites, by their families and by their clans,

Numbers 26:2

26:2 “Take a census of the whole community of Israelites, from twenty years old and upward, by their clans, everyone who can serve in the army of Israel.”