Numbers 4:31-33 - The Duties Of The Merarite Clans
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, 32 and the pillars of the court round about, and their sockets, and their pins, and their cords, of all their vessels, and of all their service; and by name ye do number the vessels of the charge of their burden. 33 This is the service of the families of the sons of Merari, for all their service, in the tent of meeting, by the hand of Ithamar son of Aaron the priest.'