Exodus 36:14-18

14He also made curtains of goats’ hair for a tent over the tabernacle. He made eleven curtains. 15The length of each curtain was thirty cubits, and the breadth of each curtain four cubits. The eleven curtains were the same size. 16He coupled five curtains by themselves, and six curtains by themselves. 17And he made fifty loops on the edge of the outermost curtain of the one set, and fifty loops on the edge of the other connecting curtain. 18And he made fifty clasps of bronze to couple the tent together that it might be a single whole.