Numbers 4:29-31

Young's Literal Translation

²⁹ `The sons of Merari, by their families, by the house of their fathers, thou dost number them;

³⁰ from a son of thirty years and upward even unto a son of fifty years thou dost number them, every one who is going in to the host, to do the service of the tent of meeting.

³¹ `And this [is] the charge of their burden, of all their service in the tent of meeting; the boards of the tabernacle, and its bars, and its pillars, and its sockets,