This [is] the service of the families of the sons of Gershon,
 &c.] Which they should execute when the camp and tabernacle were in motion: 
 in the tabernacle of the congregation in the court;
 where they should take up their burdens, or which lie in things respecting the tabernacle; this was the part they were to be employed in, namely, in taking care of the hangings of the tabernacle 
 and their charge [shall be] under the hand of Ithamar the son of Aaron
 the priest;
 the things committed to their care were delivered by him to them, and they were under his inspection and direction.