Ezekiel 48:18-20

18What remains of the area, bordering on the sacred portion and running the length of it, will be 10,000 cubits on the east side and 10,000 cubits on the west side. Its produce will supply food for the workers of the city. 19The workers from the city who farm it will come from all the tribes of Israel. 20The entire portion will be a square, 25,000 cubits on each side. As a special gift you will set aside the sacred portion, along with the property of the city.