Exodus 27:13-16

The east end of the courtyard must also be seventy-five feet long. On one side of the entry, there is to be a wall of curtains twenty-two and one-half feet long, held up by three posts on three bases. On the other side of the entry, there is also to be a wall of curtains twenty-two and one-half feet long, held up by three posts on three bases. “The entry to the courtyard is to be a curtain thirty feet wide, made of fine linen with blue, purple, and red thread. Someone who can sew well is to sew designs on it. It is to be held up by four posts on four bases.