Numbers 4:24

⁴⁹According to the commandment of the LORD they were counted by Moses, everyone according to his service and according to his burden. Thus they were counted by him, as the LORD commanded Moses.

¹⁹but do this to them, that they may live, and not die, when they approach the most holy things: Aaron and his sons shall go in and appoint everyone to his service and to his burden;

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 you shall appoint their duty to them in all their responsibilities.

⁴⁷from thirty years old and upward even to fifty years old, everyone who entered in to do the work of service and the work of bearing burdens in the Tent of Meeting,

³¹This is the duty of their burden, according to all their service in the Tent of Meeting: the tabernacle’s boards, its bars, its pillars, its sockets, ³²the pillars of the court around it, their sockets, their pins, their cords, with all their instruments, and with all their service. You shall appoint the instruments of the duty of their burden to them by name.

¹⁵“When Aaron and his sons have finished covering the sanctuary and all the furniture of the sanctuary, as the camp moves forward; after that, the sons of Kohath shall come to carry it; but they shall not touch the sanctuary, lest they die. The sons of Kohath shall carry these things belonging to the Tent of Meeting.