from thirty years and above, even to the fiftieth year, all who enter so as to minister in the tabernacle of the covenant
Other versions
King James Version
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,English Standard Version
from thirty years old up to fifty years old, everyone who could come on duty for service in the tent of meeting--New International Version
All the men from thirty to fifty years of age who came to serve in the work at the Tent of Meeting,