from thirty years and above, even to the fiftieth year, of all who enter so as to stand and minister in the tabernacle of the covenant
Other versions
King James Version
From thirty years old and upward even until fifty years old, all that enter into the host, to do the work in the tabernacle of the congregation.English Standard Version
from thirty years old up to fifty years old, all who can come on duty, to do the work in the tent of meeting.New International Version
Count all the men from thirty to fifty years of age who come to serve in the work in the Tent of Meeting.