Exodus 36:18

16He coupled five curtains by themselves, and six curtains by themselves.

17He 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.

18He made fifty clasps of bronze to couple the tent together, that it might be a unit.

19He made a covering for the tent of rams’ skins dyed red, and a covering of sea cow hides above.

20He made the boards for the tabernacle of acacia wood, standing up.