Numbers 4:24
This is the service of the families of the Gershonites, to serve and to carry burdens.
Numbers 4:15
And when Aaron and his sons have made an end of covering the sanctuary, and all the vessels of the sanctuary, when the camp is to set forward, then after that the sons of Kohath shall come to carry it. But they shall not touch any holy thing lest they die. These are the burden of the sons of Kohath in the tabernacle of the congregation.
Numbers 4:19
But do this to them, and they shall live and not die when they approach the Holy of Holies. Aaron and his sons shall go in and appoint each one of them to his service and to his burden.
Numbers 4:27
At the appointment of Aaron and his sons shall be all the service of the sons of the Gershonites, in all their burdens and in all their service. And you shall appoint all their burdens to the ones in charge.
Numbers 4:31-32
And this is the charge of their burden, according to all their service in the tabernacle of the congregation: the boards of the tabernacle, and its bars, and its pillars, and its sockets,
Numbers 4:47
from thirty years old and upward even to fifty years old, everyone that came to do the service of the ministry and the service of the burden in the tabernacle of the congregation,
Numbers 4:49
According to the command of Jehovah they were numbered by the hand of Moses, everyone according to his service and according to his burden. So they were numbered by him as Jehovah commanded Moses.