Numbers 4:2-4

Young's Literal Translation

² `Take up the sum of the sons of Kohath from the midst of the sons of Levi, by their families, by the house of their fathers;

³ from a son of thirty years and upward, even till a son of fifty years, every one going in to the host, to do work in the tent of meeting.

⁴ `This [is] the service of the sons of Kohath in the tent of meeting, the holy of holies: