TSK · Numbers 4:23

from thirty years old and upward even until fifty years old, all that enter upon the service, to do the work in the tent of meeting.

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

For by the last words of David the sons of Levi were numbered, from twenty years old and upward.

For we know that the law is spiritual: but I am carnal, sold under sin.

in the word of truth, in the power of God; by the armor of righteousness on the right hand and on the left,

For the flesh lusteth against the Spirit, and the Spirit against the flesh; for these are contrary the one to the other; that ye may not do the things that ye would.

Finally, be strong in the Lord, and in the strength of his might.

Suffer hardship with [me], as a good soldier of Christ Jesus.