Ezekiel 48:9-10

9The allotment that you will set apart to Adonai will be 25,000 in length and 10,000 in width.

10The holy allotment will be apportioned for these—for the kohanim. Toward the north it will be 25,000 cubits and toward the west 10,000 in width, toward the east 10,000 in width and toward the south 25,000 in length. Adonai’s Sanctuary will be in the midst of it.