Exodus 26:9-11

⁹You shall join five curtains by themselves and the other six curtains by themselves, and you shall double over the sixth curtain at the front of the tent. ¹⁰You shall make fifty loops on the edge of the curtain that is outermost in the first set, and fifty loops on the edge of the curtain that is outermost in the second set.

¹¹“You shall also make fifty clasps of bronze, and you shall put the clasps into the loops and join the tent together so that it will be a unit.