Numbers 4:31-33

31Now this is the duty of their loads, for all their service in the tent of meeting: the boards of the tabernacle and its bars and its pillars and its 1sockets, 32and the pillars around the court and their 2sockets and their pegs and their cords, with all their equipment and with all their service; and you shall assign each man by name the items 3he is to carry. 33This is the service of the families of the sons of Merari, according to all their service in the tent of meeting, 4under the direction of Ithamar the son of Aaron the priest.”