John Gill Bible Commentary

The families of the sons of Kohath shall pitch on the side of the tabernacle southward. Or to the right, which was the more honourable place, excepting the east or front, which was reserved for Moses and Aaron, and his sons, and who were one of these families; and is the reason why this honour was conferred upon them, as well as they had the more honourable charge, having the holy places and holy things committed to their care; and one from among them was appointed over all the Levites, and the chief of them, as they had also, when they came into the land of Canaan, almost as many cities of refuge as both their other brethren had: their situation about the tabernacle was between that and the camp of Reuben, and this accounts for it, how Korah who was of one of the families of the Kohathites, became so intimately acquainted with, and joined in a conspiracy with Dathan and Abiram, who were of the tribe of Reuben, Num 16:1. . Numbers 3:30 num 3:30 num 3:30 num 3:30And the chief of the house of the father of the families of the Kohathites shall be Elizaphan the son of Uzziel. The same man, who, with his brother Mishael, carried Nadab and Abihu out of the camp, and buried them, Lev 10:4; he descended from the last and youngest of the families of the Kohathites; and some think this was one reason at least of Korah's dissatisfaction, and of his entering into a conspiracy against Moses and Aaron, because one of a younger family of his house was preferred to this dignity before him.