20 The clans descended from Merari were named after two of his descendants, Mahli and Mushi. These were the Levite clans, listed according to their family groups. 21 The descendants of Gershon were composed of the clans descended from Libni and Shimei. 22 There were 7,500 males one month old or older among these Gershonite clans. 23 They were assigned the area to the west of the Tabernacle for their camp. 24 The leader of the Gershonite clans was Eliasaph son of Lael. 25 These two clans were responsible to care for the Tabernacle, including the sacred tent with its layers of coverings, the curtain at its entrance, 26 the curtains of the courtyard that surrounded the Tabernacle and altar, the curtain at the courtyard entrance, the ropes, and all the equipment related to their use. 27 The descendants of Kohath were composed of the clans descended from Amram, Izhar, Hebron, and Uzziel. 28 There were 8,600 males one month old or older among these Kohathite clans. They were responsible for the care of the sanctuary, 29 and they were assigned the area south of the Tabernacle for their camp. 30 The leader of the Kohathite clans was Elizaphan son of Uzziel. 31 These four clans were responsible for the care of the Ark, the table, the lampstand, the altars, the various articles used in the sanctuary, the inner curtain, and all the equipment related to their use. 32 Eleazar, son of Aaron the priest, was the chief administrator over all the Levites, with special responsibility for the oversight of the sanctuary. 33 The descendants of Merari were composed of the clans descended from Mahli and Mushi. 34 There were 6,200 males one month old or older among these Merarite clans. 35 They were assigned the area north of the Tabernacle for their camp. The leader of the Merarite clans was Zuriel son of Abihail.
Matthew Henry's Commentary on Numbers 3:20-35
Commentary on Numbers 3:14-39
(Read Numbers 3:14-39)
The Levites were in three classes, according to the sons of Levi; Gershon, Kohath, and Merari; and these were subdivided into families. The posterity of Moses were not at all honoured or privileged, but stood upon the level with other Levites; thus it was plain, that Moses did not seek the advancement of his own family, or to secure any honours to it. The tribe of Levi was by much the least of all the tribes. God's chosen are but a little flock in comparison with the world.