This is the service of the clans of the sons of the Gershonites in the tent of meeting, and their guard duty is to be under the direction of Ithamar the son of Aaron the priest.
We have here the charge of the other two families of the Levites, which, though not so honourable as the first, yet was necessary, and was to be done regularly. 1. The Gershonites were charged with all the drapery of the tabernacle, the curtains, and hangings, and the coverings of badgers' skins, Num 4:22-26.
Commenting on Numbers 4:21-33
And this is the charge of their burden,.... What should be committed to their care and charge, and they should bear and carry: according to all their service in the tabernacle of the congregation; which was assigned to them as their part, and which was very heavy and cumbersome, and therefore they had wagons allowed them, Num 7:8, the boards of the tabernacle, and the...
their charge shall be under the hand of Ithamar the son of Aaron, &c.--The Levites were generally subject to the official command of the priests in doing the ordinary work of the tabernacle. But during the journeyings Eleazar, who was next in succession to his father, took the special charge of the Kohathites [Num 4:16], while his brother Ithamar had the superintendence of the Gershonites and Merarites [Num 4:33].