Komentarz do Liczb 7:7

כפי עבדתם [TWO WAGGONS AND FOUR OXEN HE GAVE UNTO THE SONS OF GERSHON,] ACCORDING TO THEIR SERVICE — only two wagons and four oxen, whilst the sons of Merari were given twice as many, because the burden of the sons of Gershon was lighter than that of the sons of Merari since they carried the boards, the columns and the sockets.

את שתי העגלות, “the two wagons, etc.” seeing that the weight of the curtains and skins for the roof, and other incidentals, were relatively light, only two of the wagons were assigned for that task.