Numbers 4:30
“From thirty years old and upward even unto fifty years old shalt thou number them, every one that entereth into the service, to do the work of the tabernacle of the congregation.”
This is the service of the families of the sons of Gershon in the tabernacle of the congregation: and their charge shall be under the hand of Ithamar the son of Aaron the priest.
As for the sons of Merari, thou shalt number them after their families, by the house of their fathers;
From thirty years old and upward even unto fifty years old shalt thou number them, every one that entereth into the service, to do the work of the tabernacle of the congregation.
And this is the charge of their burden, according to all their service in the tabernacle of the congregation; the boards of the tabernacle, and the bars thereof, and the pillars thereof, and sockets thereof,
And the pillars of the court round about, and their sockets, and their pins, and their cords, with all their instruments, and with all their service: and by name ye shall reckon the instruments of the charge of their burden.
Why This Verse Was Tagged
This verse contains specific terms directly associated with this theme.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.”
“This shall be the service of the sons of Kohath in the tabernacle of the congregation, about the most holy things:”
“From thirty years old and upward until fifty years old shalt thou number them; all that enter in to perform the service, to do the work in the tabernacle of the congregation.”
“From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.”
“No man that warreth entangleth himself with the affairs of this life; that he may please him who hath chosen him to be a soldier.”