from thirty to fifty years old, counting everyone who comes to serve in the work of the Tent of Meeting.

Numbers 4:3
men from thirty to fifty years old--everyone who is qualified to serve in the work at the Tent of Meeting.

Numbers 4:29
As for the sons of Merari, you are to number them by their clans and families,

Numbers 4:31
This is the duty for all their service at the Tent of Meeting: to carry the frames of the tabernacle with its crossbars, posts, and bases,

Numbers 8:24
"This applies to the Levites: Men twenty-five years of age or older shall enter to perform the service in the work at the Tent of Meeting.

From thirty years old and upward even to fifty years old shall you number them, every one that enters into the service, to do the work of the tabernacle of the congregation.