Exodus 26:8-10

New King James Version

⁸ The length of each curtain shall be thirty cubits, and the width of each curtain four cubits; and the eleven curtains shall all have the same measurements. ⁹ And you shall couple five curtains by themselves and six curtains by themselves, and you shall double over the sixth curtain at the forefront of the tent. ¹⁰ You shall make fifty loops on the edge of the curtain that is outermost in one set, and fifty loops on the edge of the curtain of the second set.