“Take a census of the descendants of Kohath from among the sons of Levi, by their families, by their fathers’ households,
and the sons of Kohath by their families: Amram and Izhar, Hebron and Uzziel;
Of Kohath was the family of the Amramites, the family of the Izharites, the family of the Hebronites, and the family of the Uzzielites; these were the families of the Kohathites.
Then the Lord spoke to Moses and to Aaron, saying,
from thirty years old and upward, even to fifty years old, everyone who can enter the service of ministry to do work in the tent of meeting.