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.

Numbers 14:29

14:29 Your dead bodies will fall in this wilderness – all those of you who were numbered, according to your full number, from twenty years old and upward, who have murmured against me.

Numbers 26:57

26:57 And these are the Levites who were numbered according to their families: from Gershon, the family of the Gershonites; of Kohath, the family of the Kohathites; from Merari, the family of the Merarites.