Berean Study Bible
everyone from thirty to fifty years old who came to serve in the work at the Tent of Meeting.

King James Bible
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:

American Standard Version
from thirty years old and upward even unto fifty years old, every one that entered upon the service, for work in the tent of meeting:

Darby Bible Translation
from thirty years old and upward even to fifty years old, every one that entered into the labour, for service in the tent of meeting.

Douay-Rheims Bible
From thirty years old and upward, unto fifty years old, all that go in to the ministry of the tabernacle of the covenant:

English Revised Version
from thirty years old and upward even unto fifty years old, every one that entered upon the service, for work in the tent of meeting:

Young's Literal Translation
from a son of thirty years and upward even unto a son of fifty years, every one who is going in to the host, for service in the tent of meeting,