Exodus Chapter 26, Verse 5
From BibleWiki
5: Fifty loops shalt thou make in the one curtain, and fifty
loops shalt thou make in the edge of the curtain that is in
the coupling of the second; that the loops may take hold one
of another.
5: Every curtain shall have fifty loops on both sides, so set on,
that one loop may be against another loop, and one may be fitted to the
other.
5: Fifty loops shalt thou make for one curtain, and fifty loops shalt thou make on the part of the curtain answering to the coupling of the second, opposite [each other], corresponding to each other at each point.
Exodus Chapter 26, Verse 5/commentary

