I Chronicles 23:24
World English Bible (WEB)
"These were the sons of Levi after their fathers' houses, even the heads of the fathers' houses of those who were counted individually, in the number of names by their polls, who did the work for the service of the house of the Lord, from twenty years old and upward."
About I Chronicles
Genealogies and David's reign from a priestly perspective.
Old Testament • Book #13