Numbers 4:21-28 - Duties Of The Gershonites
21 Yahweh spoke to Moses and Aaron, saying, 22 "{Take a census} of the descendants of Gershon also, according to {their families} and clans, 23 from {those twenty years old} and above until {fifty years old}; you will muster them, all who come to help to do the work of the tent of assembly. 24 This [is] the work of the clans of the Gershonites: to serve and to carry. 25 They will carry the curtains of the tabernacle and the tent of assembly [and] its covering and the covering of {fine leather}, which {is on top of it}, and the curtain of the doorway of the tent of assembly, 26 and the curtains of the courtyard, and the covering for the doorway of the gate of the courtyard, which [is] all around on the tabernacle and altar, and their cords and all the vessels of their work; and all that is done to them they will do.
27 And all the work of the descendants of the Gershonites will be at {the command} of Aaron and his sons, for all they [are to] carry and for all their work, and you will appoint to them responsibility for all they [are to] carry. 28 This [is] the work of the clan of the descendants of the Gershonites in the tent of assembly, and their responsibility [lies] {under the direction} of Ithamar son of Aaron the priest.