1 Chronicles 23:26-28 Darby Translation 1890 (DARBY)

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

1 Chronicles 23