Numbers 4:21-33

The LORD said to Moses, “Take a census also of the Gershonites by their families and clans. Count all the men from thirty to fifty years of age who come to serve in the work at the tent of meeting. “This is the service of the Gershonite clans in their carrying and their other work: They are to carry the curtains of the tabernacle, that is, the tent of meeting, its covering and its outer covering of durable leather, the curtains for the entrance to the tent of meeting, the curtains of the courtyard surrounding the tabernacle and altar, the curtain for the entrance to the courtyard, the ropes and all the equipment used in the service of the tent. The Gershonites are to do all that needs to be done with these things. All their service, whether carrying or doing other work, is to be done under the direction of Aaron and his sons. You shall assign to them as their responsibility all they are to carry. This is the service of the Gershonite clans at the tent of meeting. Their duties are to be under the direction of Ithamar son of Aaron, the priest. “Count the Merarites by their clans and families. Count all the men from thirty to fifty years of age who come to serve in the work at the tent of meeting. As part of all their service at the tent, they are to carry the frames of the tabernacle, its crossbars, posts and bases, as well as the posts of the surrounding courtyard with their bases, tent pegs, ropes, all their equipment and everything related to their use. Assign to each man the specific things he is to carry. This is the service of the Merarite clans as they work at the tent of meeting under the direction of Ithamar son of Aaron, the priest.”