Exodus 26:4-6

New Revised Standard Version, Anglicised Catholic Edition

⁴ You shall make loops of blue on the edge of the outermost curtain in the first set; and likewise you shall make loops on the edge of the outermost curtain in the second set. ⁵ You shall make fifty loops on the one curtain, and you shall make fifty loops on the edge of the curtain that is in the second set; the loops shall be opposite one another. ⁶ You shall make fifty clasps of gold, and join the curtains to one another with the clasps, so that the tabernacle may be one whole.