1 Chronicles 23:26-28

Young's Literal Translation

²⁶ and also of the Levites, `None [are] to bear the tabernacle and all its vessels for its service;'

²⁷ for by the last words of David they [took] the number of the sons of Levi from a son of twenty years and upward,

²⁸ for their station [is] at 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 cleansing of every holy thing, and the work of the service of the house of God,