Numbers 4:16, 27

“Eleazar, son of Aaron the priest, has oversight of the lamp oil,  the fragrant incense,  the daily grain offering,  and the anointing oil.  He has oversight of the entire tabernacle and everything in it, the holy objects and their utensils.”

“All the service of the Gershonites, all their transportation duties and all their other work, is to be done at the command of Aaron and his sons; you are to assign to them all that they are responsible to carry.