TSK · Numbers 8:24

from thirty years old and upward even until fifty years old, all who enter into the service, to do the work in the Tent of Meeting.

The Levites were numbered from thirty years old and upward: and their number by their polls, man by man, was thirty-eight thousand.

and the pattern of all that he had by the Spirit, for the courts of the house of Yahweh, and for all the surrounding rooms, for the treasuries of the house of God, and for the treasuries of the dedicated things;

What soldier ever serves at his own expense? Who plants a vineyard, and doesn't eat of its fruit? Or who feeds a flock, and doesn't drink from the flock's milk?

This instruction I commit to you, my child Timothy, according to the prophecies which led the way to you, that by them you may wage the good warfare;

You therefore must endure hardship, as a good soldier of Christ Jesus.