Numbers 4:21-33

²¹ And the Lord said to Moses, ²² Let the sons of Gershon be numbered by families, in the order of their fathers' houses; ²³ All those from thirty to fifty years old who are able to do the work of the Tent of meeting. ²⁴ This is to be the work of the Gershonites, the things they are to do and take up. ²⁵ They are to take up the curtains of the House, and the Tent of meeting with its cover and the leather cover over it, and the hangings for the door of the Tent of meeting; ²⁶ And the hangings for the open space round the House and the altar, and the curtain for its doorway, with the cords and all the things used for them; whatever is necessary for these, they are to do. ²⁷ From the mouth of Aaron and his sons the Gershonites will have word about all the things they are to do and take up; you are to give them their orders. ²⁸ This is the work of the family of the Gershonites in the Tent of meeting, and they will be under the direction of Ithamar, the son of Aaron the priest. ²⁹ The sons of Merari are to be numbered by families, in the order of their fathers' houses; ³⁰ Every one from thirty to fifty years old who is able to do the work of the Tent of meeting. ³¹ And this is their part in the work of the Tent of meeting: the transport of the boards and the rods of the Tent, with the pillars and their bases; ³² And the pillars of the open space outside it, with their bases and their nails and cords and all the instruments used, and everything which has to be done there; all the instruments for which they are responsible are to be numbered by name. ³³ This is the work which the sons of Merari are to do in connection with the Tent of meeting, under the direction of Ithamar, the son of Aaron the priest.