Exodus 36:14-18

He made curtains of goats’ hair for the tent over the tabernacle; he made eleven curtains. The length of each curtain was thirty cubits, and the width of each curtain four cubits; the eleven curtains were the same size. He coupled five curtains by themselves and six curtains by themselves. And he made fifty loops on the edge of the curtain that is outermost in one set, and fifty loops he made on the edge of the curtain of the second set. He also made fifty bronze clasps to couple the tent together, that it might be one.