Exodus 26:9

⁷And thou shalt make for a covering of the tabernacle skins with the hair on, thou shalt make them eleven skins.

⁸The length of one skin thirty cubits, and the breadth of one skin four cubits: there shall be the same measure to the eleven skins.

— Exodus 26:9 —

¹⁰And thou shalt make fifty loops on the border of one skin, which is in the midst for the joinings; and thou shalt make fifty loops on the edge of the second skin that joins it.

¹¹And thou shalt make fifty brazen rings; and thou shalt join the rings by the loops, and thou shalt join the skins, and they shall be one.