Numbers 4:43

from five and twenty years old and upward till fifty years old, every one that goes in to minister in the services of the tabernacle of witness.

From thirty years old and upward even unto fifty years old, every one that entereth into the service, for the work in the tabernacle of the congregation,

from thirty years old and upward even to fifty years old—everyone who entered into the service for work in the Tent of Meeting,