Numbers 4:16

And to the office of Eleazar, the son of Aaron, the priest, pertaineth the oil for the light, and the sweet incense, and the daily meat-offering accompanying the burnt offering in the morning and in the evening, and the anointing oil; he had to see that all these were provided as needed; and the oversight of all the Tabernacle, and of all that therein is, in the Sanctuary and in the vessels thereof; he was responsible for all the appointments. And as superintendent of the entire Tabernacle and all its equipment he had charge of the work of the Kohathites. Since the ministry of the latter was so important, but since it was also essential that they did not come into contact with the sacred vessels, the Lord renews His words of caution with special emphasis.