יחזקאל, פרק מ״ח, פסוק י״ז

The architectural vision for the future city includes a precise layout of the open spaces surrounding its borders. Commentators agree that the perimeter is defined by a designated empty area just outside the city walls. This zone is meant to remain completely clear and exposed. It cannot be used for building homes, nor can it be utilized for agricultural purposes such as sowing fields or planting trees.

The exact size of this open boundary extends outward for two hundred and fifty measuring units, identified as reeds [מצודת דוד], in all four directions: north, south, east, and west. This specific measurement seamlessly completes the broader planning of the city's territory.

[רד״ק] explains the underlying calculation that brings these numbers together. The city itself spans a length of four thousand five hundred units from north to south. By adding the two hundred and fifty units of open space on the northern border and another two hundred and fifty units on the southern border, the total measurement reaches exactly five thousand units. This final sum accounts for the complete and exact width of the entire city estate.