Numbers 4:21-33

²¹ The Lord said to Moses, ²² "Take a census of the sons of Gershon also, by their families and their fathers' houses; ²³ from thirty years old up to fifty years old, you shall number them, all who can enter for service, to do the work in the tent of meeting. ²⁴ This is the service of the families of the Gershonites, in serving and bearing burdens: ²⁵ they shall carry the curtains of the tabernacle, and the tent of meeting with its covering, and the covering of goatskin that is on top of it, and the screen for the door of the tent of meeting, ²⁶ and the hangings of the court, and the screen for the entrance of the gate of the court which is around the tabernacle and the altar, and their cords, and all the equipment for their service; and they shall do all that needs to be done with regard to them. ²⁷ All the service of the sons of the Gershonites shall be at the command of Aaron and his sons, in all that they are to carry, and in all that they have to do; and you shall assign to their charge all that they are to carry. ²⁸ This is the service of the families of the sons of the Gershonites in the tent of meeting, and their work is to be under the oversight of Ith'amar the son of Aaron the priest. ²⁹ "As for the sons of Merar'i, you shall number them by their families and their fathers' houses; ³⁰ from thirty years old up to fifty years old, you shall number them, every one that can enter the service, to do the work of the tent of meeting. ³¹ And this is what they are charged to carry, as the whole of their service in the tent of meeting: the frames of the tabernacle, with its bars, pillars, and bases, ³² and the pillars of the court round about with their bases, pegs, and cords, with all their equipment and all their accessories; and you shall assign by name the objects which they are required to carry. ³³ This is the service of the families of the sons of Merar'i, the whole of their service in the tent of meeting, under the hand of Ith'amar the son of Aaron the priest."