Numbers 4:31-33

31These are their duties as they work at the tent of meeting: They will carry the framework for the inner tent, the crossbars, posts, and sockets,

32the posts for the surrounding courtyard, the bases, pegs, and ropes. They must take care of all this equipment. Tell each man by name the things he will carry.

33This is what the Merarite families will do as they work at the tent of meeting. Ithamar, son of the priest Aaron, will be in charge of them.”