Numbers 3:21-26

The descendants of Gershon were composed of the clans descended from Libni and Shimei. There were 7,500 males one month old or older among these Gershonite clans. They were assigned the area to the west of the Tabernacle for their camp. The leader of the Gershonite clans was Eliasaph son of Lael. These two clans were responsible to care for the Tabernacle, including the sacred tent with its layers of coverings, the curtain at its entrance, the curtains of the courtyard that surrounded the Tabernacle and altar, the curtain at the courtyard entrance, the ropes, and all the equipment related to their use.