Numbers 4:21-33

And the LORD said to Moses, “Record the names of the members of the clans and families of the Gershonite division of the tribe of Levi. List all the men between the ages of thirty and fifty who are eligible to serve in the Tabernacle. “These Gershonite clans will be responsible for general service and carrying loads. They must carry the curtains of the Tabernacle, the Tabernacle itself with its coverings, the outer covering of fine goatskin leather, and the curtain for the Tabernacle entrance. They are also to carry the curtains for the courtyard walls that surround the Tabernacle and altar, the curtain across the courtyard entrance, the ropes, and all the equipment related to their use. The Gershonites are responsible for all these items. Aaron and his sons will direct the Gershonites regarding all their duties, whether it involves moving the equipment or doing other work. They must assign the Gershonites responsibility for the loads they are to carry. So these are the duties assigned to the Gershonite clans at the Tabernacle. They will be directly responsible to Ithamar son of Aaron the priest. “Now record the names of the members of the clans and families of the Merarite division of the tribe of Levi. List all the men between the ages of thirty and fifty who are eligible to serve in the Tabernacle. “Their only duty at the Tabernacle will be to carry loads. They will carry the frames of the Tabernacle, the crossbars, the posts, and the bases; also the posts for the courtyard walls with their bases, pegs, and ropes; and all the accessories and everything else related to their use. Assign the various loads to each man by name. So these are the duties of the Merarite clans at the Tabernacle. They are directly responsible to Ithamar son of Aaron the priest.”