Numbers 3:26

and the hangings of the court, and the curtain for the door of the court, which is by the Tabernacle, the white byssus curtains as well as the beautiful entrance curtain of variegated material, and by the altar round about, and the cords of it for all the service thereof, the various guy-ropes for the Tabernacle, but not for the court. The Gershonites had to tend to all the drapery and the curtains but the screen of the Most Holy Place.