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,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,Catholic Public Domain Version
from thirty years and above, even to the fiftieth year, all who enter so as to minister in the tabernacle of the covenant