Exodus 36:17 in the World English Bible
He made fifty loops on the edge of the curtain that was outermost in the coupling, and he made fifty loops on the edge of the curtain which was outermost in the second coupling.
Context
16 And he coupled five curtains by themselves, and six curtains by themselves.
17 And he made fifty loops upon the uttermost edge of the curtain in the coupling, and fifty loops made he upon the edge of the curtain which coupleth the second.
18 And he made fifty taches of brass to couple the tent together, that it might be one.