And when Aaron and his sons have finished covering the sanctuary and all the furnishings of the sanctuary, as the camp sets out, after that the sons of Kohath shall come to carry these, but they must not touch the holy things, lest they die. These are the things of the tent of meeting that the sons of Kohath are to carry.
We have here a second muster of the tribe of Levi. As that tribe was taken out of all Israel to be God's peculiar, so the middle-aged men of that tribe were taken from among the rest to be actually employed in the service of the tabernacle. Now observe, I. Who were to be taken into this number. All the males from thirty years old to fifty.
Commenting on Numbers 4:1-20
And to the office of Eleazar, the son of Aaron the priest, pertaineth the oil for the light,.... The following things, to bear them, according to some Jewish writers; but rather it was to give the oil for the light, that is, the vessels, and so the vessels of the oil to the sons of the Kohathites; agreeably to which are the Targums of Onkelos...
the sons of Kohath shall come to bear it, but they shall not touch any holy thing, lest they die--The mode of transport was upon the shoulders of the Levites (see on Num 7:9), although afterwards wheeled vehicles were employed (Sa2 6:3; Ch1 15:12).