Numbers 4:18 ASV

¹⁶  And the charge of Eleazar the son of Aaron the priest shall be the oil for the light, and the sweet incense, and the continual meal-offering, and the anointing oil, the charge of all the tabernacle, and of all that therein is, the sanctuary, and the furniture thereof.

¹⁷  And Jehovah spake unto Moses and unto Aaron, saying,

¹⁸  Cut ye not off the tribe of the families of the Kohathites from among the Levites;

¹⁹  but thus do unto them, that they may live, and not die, when they approach unto the most holy things: Aaron and his sons shall go in, and appoint them every one to his service and to his burden;

²⁰  but they shall not go in to see the sanctuary even for a moment, lest they die.