Numbers 3:25-26

25Now 1the duties of the sons of Gershon in the tent of meeting included the tabernacle and 2the tent, its covering, and 3the curtain for the entrance of the tent of meeting, 26and 4the curtains of the courtyard, 5the curtain for the entrance of the courtyard which is around the tabernacle and the altar, and its ropes, according to all the service 6concerning them.