Exodus 36:13

and they made the two emerald stones clasped together and set in gold, graven and cut after the cutting of a seal with the names of the children of Israel;

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

He made fifty clasps of gold, and coupled the curtains to one another with the clasps: so the tabernacle was a unit.