Numbers 4:16, 28, 33

“Eleazar son of Aaron, the priest, is to have charge of the oil for the light, the fragrant incense, the regular grain offering and the anointing oil. He is to be in charge of the entire tabernacle and everything in it, including its holy furnishings and articles.”

This is the service of the Gershonite clans at the tent of meeting. Their duties are to be under the direction of Ithamar son of Aaron, the priest.

This is the service of the Merarite clans as they work at the tent of meeting under the direction of Ithamar son of Aaron, the priest.”