From Merari came the clans of the Mahlites and Mushites; these were the Merarite clans.
The Levites being granted to Aaron to minister to him, they are here delivered to him by tale, that he might know what he had, and employ them accordingly. Observe, I. By what rule they were numbered: Every male from a month old and upward, Num 3:15.
Commenting on Numbers 3:14-39
And those that were numbered of them,.... Of the above two families: according to the number of all the males, from a month old and upward, were six thousand and two hundred; 6,200 men; the least number of them all.
Num 3:33-37 The Merarites, who formed two families, comprising 6200 males, were to encamp on the north side of the tabernacle, under their prince Zuriel, and to observe the boards, bolts, pillars, and sockets of the dwelling-place (Exo 26:15, Exo 26:26, Exo 26:32, Exo 26:37), together with all the vessels thereof (the plugs and tools), and all that had to be done in connection therewith...
Commenting on Numbers 3:33-37