19 but work thus to them, that they live and not die, when they approach the holy of holies: Aharon and his sons go in and set them man by man to his service and to his burden:
Numbers 4:19 Cross References - ECB
Numbers 4:15
15 And Aharon and his sons finish covering the holies and all the instruments of the holies, as the camp pulls stakes. Afterward, the sons of Qehath come to bear it: but they touch not the holies, lest they die. - these are the burden of the sons of Qehath in the tent of the congregation.