Exodus 30:14
All who are registered, 20 years of age and older, are to give a contribution to the LORD.
Numbers 1:3
from 20 years and upward. You and Aaron are to register everyone in Israel who is able to go to war, company by company.
Numbers 1:18
They assembled the entire community together during the second month. Then they recorded their ancestries, according to their tribes and ancestral houses, as well as the names of the men 20 years old and above individually,
Numbers 1:20
The genealogies of the descendants of Reuben, the firstborn of Israel, were recorded individually, according to their tribes and ancestral houses, as were the names of all the men 20 years and above who could serve in the army.
Numbers 14:29
Your corpses will fall in this wilderness every single one of you who has been counted among you, according to your number from 20 years and above, who complained against me.
Numbers 26:2
"Take a census of the entire community of Israel from the age of 20 years and above, according to each ancestral tribe, counting everyone who is able to go out to war in Israel."
Numbers 32:11
"Not one of the men who went up from Egypt, from 20 years old and above, will see the land that I promised to give to their ancestors, that is, to Abraham, Isaac, and Jacob, because none of them followed me wholeheartedly,