'Age' in the Bible

from 30 years and older through the age of 50 years, from everyone who can enter the service to perform work at the Tent of Meeting.

"This is what pertains to the Levites: At the age of twenty-five years and upward one may begin to join the company in the work of the tent of meeting,

And from the age of fifty years they shall cease waiting upon the service thereof, and shall serve no more:

Those that can be redeemed, you are to redeem at the age of one month, based on your estimate for five shekels of silver, according to the shekel of the sanctuary, that is, for 20 gerahs.

"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."

All of those individuals numbered 23,000. No male from the age of a month and above was numbered among the Israelis because no inheritance was to be assigned to them among the Israelis.