These were the sons of Levi after the house of their fathers; even the chief of the fathers, as they were counted by number of names by their polls, that did the work for the service of the house of the LORD, from the age of twenty years and upward.
Beside their genealogy of males, from three years old and upward, even to every one that enters into the house of the LORD, his daily portion for their service in their charges according to their courses;
This is it that belongs to the Levites: from twenty and five years old and upward they shall go in to wait on the service of the tabernacle of the congregation: