Exodus 36:11-12

Leeser(i) 11 And he made loops of blue on the edge of the one curtain, which was the outside in the coupling: the like he made on the border of the curtain, which was the outmost on the second coupling. 12 Fifty loops made he on the one curtain, and fifty loops made he on the edge of the curtain which was in the second coupling: the loops were fixed opposite to each other.