19 But do this for them so that they may live and not die when they approach the Most Holy Place: Aaron and his sons are to go in and set specific responsibilities for each of them to carry out.
Numbers 4:19 Cross References - ISV
Numbers 4:15
15 “When Aaron and his sons have finished covering the sanctuary and all the utensils of the sanctuary, and the camp is about to travel, then the descendants of Kohath are to come and carry them, but they are not to touch the most sacred objects, so they won’t die. These are the duties of the descendants of Kohath at the Tent of Meeting.”