Exodus 27:13-16

The width of the court on the east side shall be fifty cubits. The hangings for the one side of the gate shall be fifteen cubits with their three pillars and their three sockets. And for the other side shall be hangings of fifteen cubits with their three pillars and their three sockets. For the gate of the court there shall be a screen of twenty cubits, of blue and purple and scarlet material and fine twisted linen, the work of a weaver, with their four pillars and their four sockets.