Numbers 4:31-33

31This is what they are responsible to carry as their entire service in the tent of meeting: the frames of the tabernacle, its crossbars, its posts, its sockets,

32and the posts of the surrounding courtyard with their sockets, tent pegs, and ropes, along with all their furnishings and everything for their service. You are to assign by names the items that each man is responsible to carry.

33This is the service of the families of the Merarites, their entire service concerning the tent of meeting, under the authority of Ithamar son of Aaron the priest.”