“Let not the tribe of the clans of the Kohathites be destroyed from among the Levites,
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
But they shall not go in to see when the holy things are covered,.... They were not to be present while they were packing up, test they should see any of them with their eyes; they were not to go in until they were quite covered out of sight; which may signify the hiding of the mysteries of grace in those things under the former...
Cut ye not off the tribe of the families of the Kohathites from among the Levites: (l) Committing by your negligence that the holy things are not well wrapped, causing them to perish by touching it.