Numbers 4:18 WBT

¹⁶  And to the office of Eleazar the son of Aaron the priest [pertain] the oil for the light, and the sweet incense, and the daily meat-offering, and the anointing oil, [and] the oversight of all the tabernacle, and of all that [is] in it, in the sanctuary, and in its vessels.

¹⁷  And the LORD spoke to Moses and to Aaron, saying,

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

¹⁹  But thus do to them, that they may live, and not die, when they approach to 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 when the holy things are covered, lest they die.