Exodus 26:10-11

10You shall make fifty loops on the edge of the 1curtain that is outermost in the first 2set, and fifty loops on the edge of the curtain that is outermost in the second 3set.

11“You shall also make fifty clasps of 4bronze, and you shall put the clasps into the loops and 5join the tent together so that it will be 6a unit.