These were the sons of Levi by their fathers’ houses; even the heads of their fathers’ houses, as they were counted individually by the number of their names, that did the work for the service of the house of the LORD, from the age of twenty years and upward.
Besides their males enrolled by genealogy, from three years old and upward, even unto everyone that enters into the house of the LORD, his daily portion for their service in their work according to their divisions;
This is what pertains to the Levites: from twenty and five years old and upward they shall go in to wait upon the service of the tabernacle of meeting: