Numbers 3:31-35

They were responsible for the care of the ark, the table, the lampstand, the altars, the articles of the sanctuary used in ministering, the curtain, and everything related to their use. The chief leader of the Levites was Eleazar son of Aaron, the priest. He was appointed over those who were responsible for the care of the sanctuary. To Merari belonged the clans of the Mahlites and the Mushites; these were the Merarite clans. The number of all the males a month old or more who were counted was 6,200. The leader of the families of the Merarite clans was Zuriel son of Abihail; they were to camp on the north side of the tabernacle.