Ezekiel 42:15-20

After he had finished measuring what was inside the Temple area, he took me out the east gate and measured it from the outside. Using his measuring stick, he measured the east side: eight hundred seventy-five feet. He measured the north side: eight hundred seventy-five feet. He measured the south side: eight hundred seventy-five feet. Last of all he went to the west side and measured it: eight hundred seventy-five feet. He measured the wall on all four sides. Each wall was eight hundred seventy-five feet. The walls separated the holy from the ordinary.