Numbers 3:23-29

23The families of the Gershonites shall encamp behind the tabernacle westward. 24And the head of the house of the father of the Gershonites shall be Eliasaph the son of Lael. 25And the charge of the sons of Gershon in the tabernacle of the congregation shall be the tabernacle, and the tent, its covering and the hanging for the door of the tabernacle of the congregation, 26And the hangings of the court, and the curtain for the door of the court, which is around the tabernacle, and the altar, and the cords of it for all the service of it. 27And of Kohath was the family of the Amramites, and the family of the Izharites, and the family of the Hebronites, and the family of the Uzzielites: these are the families of the Kohathites. 28In the number of all the males, from a month old and upward, were eight thousand and six hundred, keeping the charge of the sanctuary. 29The families of the sons of Kohath shall encamp on the side of the tabernacle southward.