Carl Friedrich Keil and Franz Delitzsch Old Testament Commentary

The Gershonites were divided into two families, containing 7500 males. They were to encamp under their chief Eliasaph, behind the tabernacle, i.e., on the western side (Num 3:23, Num 3:24), and were to take charge of the dwelling-place and the tent, the covering, the curtain at the entrance, the hangings round the court with the curtains at the door, and the cords of the tent, "in relation to all the service thereof" (Num 3:25.); that is to say, according to the more precise injunctions in Num 4:25-27, they were to carry the tapestry of the dwelling (the inner covering, Exo 26:1.), and of the tent (i.e., the covering made of goats' hair, Exo 26:7.), the covering thereof (i.e., the covering of rams' skins dyed red, and the covering of sea-cow skin upon the top of it, Exo 27:16), the hangings of the court and the curtain at the entrance (Exo 27:9, Exo 27:16), which surrounded the altar (of burnt-offering) and the dwelling round about, and their cords, i.e., the cords of the tapestry, coverings, and curtains (Exo 27:14), and all the instruments of their service, i.e., the things used in connection with their service (Exo 27:19), and were to attend to everything that had to be done to them; in other words, to perform whatever was usually done with those portions of the sanctuary that are mentioned here, especially in setting up the tabernacle or taking it down. The suffix in מיתריו (Num 3:26) does not refer to the court mentioned immediately before; for, according to Num 3:37, the Merarites were to carry the cords of the hangings of the court, but to the "dwelling and tent," which stand farther off. In the same way the words, "for all the service thereof," refer to all those portions of the sanctuary that are mentioned, and mean "everything that had to be done or attended to in connection with these things."