Numbers 1:3
from twenty years old and upward, all who are able to go out to war in Israel. You and Aaron shall number them by their divisions.
Exodus 30:14
Everyone who passes over to those who are numbered, from twenty years old and upward, shall give the offering to the LORD.
Numbers 14:29
your dead bodies shall fall in this wilderness; and all who were numbered of you, according to your whole number, from twenty years old and upward, who have murmured against me,
Exodus 12:17
You shall observe the feast of unleavened bread; for in this same day have I brought your armies out of the land of Egypt: therefore you shall observe this day throughout your generations by an ordinance forever.
Numbers 26:2
"Take a census of all the congregation of the children of Israel, from twenty years old and upward, by their fathers' houses, all who are able to go forth to war in Israel."
Numbers 32:11
'Surely none of the men who came up out of Egypt, from twenty years old and upward, shall see the land which I swore to Abraham, to Isaac, and to Jacob; because they have not wholly followed me:
Numbers 33:1
These are the journeys of the children of Israel, when they went forth out of the land of Egypt by their armies under the hand of Moses and Aaron.
Deuteronomy 3:18
I commanded you at that time, saying, "The LORD your God has given you this land to possess it: you shall pass over armed before your brothers the children of Israel, all the men of valor.
Deuteronomy 24:5
When a man takes a new wife, he shall not go out in the army, neither shall he be assigned any business: he shall be free at home one year, and shall cheer his wife whom he has taken.
2 Samuel 24:9
Joab gave up the sum of the numbering of the people to the king: and there were in Israel eight hundred thousand valiant men who drew the sword; and the men of Judah were five hundred thousand men.
2 Chronicles 17:13-18
He had many works in the cities of Judah; and men of war, mighty men of valor, in Jerusalem.
2 Chronicles 26:11-13
Moreover Uzziah had an army of fighting men, who went out to war by bands, according to the number of their reckoning made by Jeiel the scribe and Maaseiah the officer, under the hand of Hananiah, one of the king's captains.