Exodus 36:18

And he coupled five curtains by themselves, and six curtains by themselves.

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.

And he made a covering for the tent of rams’ skins dyed red, and a covering of badgers’ skins above that.

And he made boards for the tabernacle of shittim wood, standing up.