Numbers 4:21–32

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.

²⁹As for the sons of Merari, thou shalt number them by their families, by their fathers’ houses; ³⁰from thirty years old and upward even unto fifty years old shalt thou number them, every one that entereth upon the service, to do the work of the tent of meeting. ³¹And this is the charge of their burden, according to all their service in the tent of meeting: the boards of the tabernacle, and the bars thereof, and the pillars thereof, and the sockets thereof, ³²and the pillars of the court round about, and their sockets, and their pins, and their cords, with all their instruments, and with all their service: and by name ye shall appoint the instruments of the charge of their burden.