Exodus 30:14
Anyone that passes among those that are numbered, from twenty years old and above, shall give the offering unto the LORD.
Numbers 1:3
from twenty years old and upward, all that are able to go forth to war in Israel; thou and Aaron shall number them by their hosts.
Numbers 1:18
and they assembled all the congregation together on the first of the second month, and they were gathered by their lineages, by the houses of their fathers, according to the number of the names, from twenty years old and upward, by their polls,
Numbers 1:20
And the sons of Reuben, the firstborn of Israel, by their generations, after their families, by the houses of their fathers, according to the number of the names, by their polls, every male from twenty years old and upward, all that were able to go forth to war;
Numbers 14:29
Your carcasses shall fall in this wilderness, all that were numbered of you, according to your whole number, from twenty years old and upward, who have murmured against me;
Numbers 26:2
Take the sum of all the congregation of the sons of Israel, from twenty years old and upward, by the houses of their fathers, all that are able to go to war in Israel.
Numbers 32:11
Surely none of the men that came up out of Egypt, from twenty years old and upward, shall see the land which I swore unto Abraham, unto Isaac, and unto Jacob; because they were not perfect in following me,