Ezekiel 42:15-20

When the man had finished measuring the inside of the Temple area, he led me out through the east gateway to measure the entire perimeter. He measured the east side with his measuring rod, and it was 875 feet long. Then he measured the north side, and it was also 875 feet. The south side was also 875 feet, and the west side was also 875 feet. So the area was 875 feet on each side with a wall all around it to separate what was holy from what was common.