Numbers 4:16, 28, 33

“The responsibility of Eleazar, the son of Aaron the priest, is the oil for the light, the fragrant incense, the continual grain offering, and the anointing oil—the responsibility of all the tabernacle and everything that is in it, with the sanctuary and its furnishings.”

This is the service of the families of the sons of Gershon in the Tent of Meeting (tabernacle); and their duties shall be under the direction of Ithamar the son of Aaron, the [high] priest.

This is the work of the families of the sons of Merari, according to all their tasks in the Tent of Meeting (tabernacle), under the direction of Ithamar the son of Aaron, the priest.”