Numbers 4:31-33

31This is what they are assigned to carry [on the march], according to all their service in the Tent of Meeting: the boards [for the framework] of the tabernacle and its bars and its pillars and its sockets or bases,

32and the pillars around the courtyard with their sockets or bases and their pegs and their cords (tent ropes), with all their equipment and with all their [accessories for] service; and you shall assign each man by name the items he is to carry [on the march].

33This is the work of the families of the sons of Merari, according to all their tasks in the Tent of Meeting (tabernacle), under the direction of Ithamar the son of Aaron, the priest.”