Numbers 4:21–28

²¹And Jehovah spake unto Moses, saying, ²²Take the sum of the sons of Gershon also, by their fathers’ houses, by their families; ²³from thirty years old and upward until fifty years old shalt thou number them; all that enter in to wait upon the service, to do the work in the tent of meeting. ²⁴This is the service of the families of the Gershonites, in serving and in bearing burdens: ²⁵they shall bear the curtains of the tabernacle, and the tent of meeting, its covering, and the covering of sealskin that is above upon it, and the screen for the door of the tent of meeting, ²⁶and the hangings of the court, and the screen for the door of the gate of the court, which is by the tabernacle and by the altar round about, and their cords, and all the instruments of their service, and whatsoever shall be done with them: therein shall they serve. ²⁷At the commandment of Aaron and his sons shall be all the service of the sons of the Gershonites, in all their burden, and in all their service; and ye shall appoint unto them in charge all their burden. ²⁸This is the service of the families of the sons of the Gershonites in the tent of meeting: and their charge shall be under the hand of Ithamar the son of Aaron the priest.