1 Chronicles 23:26 DBY

²⁴  These were the sons of Levi according to their fathers' houses, the chief fathers, as they were reckoned, by number of names by their polls, who did the work of the service of the house of Jehovah, from twenty years old and upward.

²⁵  For David said, Jehovah the God of Israel has given rest to his people, and he will dwell in Jerusalem for ever;

²⁶  and the Levites also have no more to carry the tabernacle, nor any of its vessels for its service.

²⁷  For by the last words of David was this [done], -- the numbering of the sons of Levi from twenty years old and upward.

²⁸  For their place was by the side of the sons of Aaron for the service of the house of Jehovah, over the courts, and over the chambers, and over the purifying of all holy things, and [for] the work of the service of the house of God;