from thirty years old to fifty years old, everyone who enters the service to do the work in the tent of meeting.
In context
1Yahweh spoke to Moses and Aaron. He said, 2“Take a census of the descendants of Kohath from among the sons of Levi, by their clans, by their ancestral houses, 3from thirty years old to fifty years old, everyone who enters the service to do the work in the tent of meeting. 4This is the service of the descendants of Kohath in the tent of meeting: the most holy things. 5When the camp is to set out, Aaron and his sons shall come and take down the screening curtain, and cover the ark of the testimony with it.