Numbers 3:32 in the King James Version
And Eleazar the son of Aaron the priest shall be chief over the chief of the Levites, and have the oversight of them that keep the charge of the sanctuary.
Context
31 Their duty shall be the ark, the table, the lamp stand, the altars, the vessels of the sanctuary with which they minister, the screen, and all its service.
32 Eleazar the son of Aaron the priest shall be prince of the princes of the Levites, with the oversight of those who keep the requirements of the sanctuary.
33 Of Merari was the family of the Mahlites and the family of the Mushites. These are the families of Merari.