“Take a census of the Kohathites from among the Levites, by their families and by their clans,
The sons of Kohath by their families were: Amram, Izhar, Hebron, and Uzziel.
From Kohath came 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 Aaron:
from thirty years old and upward to fifty years old, all who enter the company to do the work in the tent of meeting.