These were the sons of Levi after the house of their fathers, the chief of the fathers, as they were counted by number of names by their heads, the ones who did the work for the service of the house of Jehovah, from the age of twenty years and upward.
besides registering the males from three years and upward, to everyone who enters into the house of Jehovah, giving his daily portion for their service in their charges according to their divisions,
This is that which pertains to the Levites. From twenty-five years old and upward they shall go in to wait upon the service of the tabernacle of the congregation.