Exodus 36:10

8All the wise-hearted men among those who did the work made the tabernacle with ten curtains of fine twined linen, blue, purple, and scarlet. They made them with cherubim, the work of a skillful workman.

9The length of each curtain was twenty-eight cubits, and the width of each curtain four cubits. All the curtains had one measure.

10He coupled five curtains to one another, and the other five curtains he coupled to one another.

11He made loops of blue on the edge of the one curtain from the edge in the coupling. Likewise he made in the edge of the curtain that was outermost in the second coupling.

12He made fifty loops in the one curtain, and he made fifty loops in the edge of the curtain that was in the second coupling. The loops were opposite to one another.