Exodus 36:15LXX

13And he made fifty taches of gold, and coupled the curtains one unto another with the taches: so it became one tabernacle.

14And he made curtains goats' for the tent over the tabernacle: eleven curtains he made them.

15The length of one curtain thirty cubits, and four cubits the breadth of one curtain: the eleven curtains of one size.

16And he coupled five curtains by themselves, and six curtains by themselves.

17And 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.