Bear it — Upon their shoulders. Afterward the priests themselves, being multiplied, carried these things, though the Levites also were not excluded. They shall not touch — Before they are covered.
Related Commentaries of Numbers 4:15
Numbers 4:15
15 And when Aaron and his sons have made an end of covering the sanctuary, and all the vessels of the sanctuary, as the camp is to set forward; after that, the sons of Kohath shall come to bear it: but they shall not touch any holy thing, lest they die. These things are the burden of the sons of Kohath in the tabernacle of the congregation.