Ezekiel 40:17

The outward court — So called in regard of the more inward court, between that where he was, and the temple itself; this court, was the second about the temple. Chambers — Not only lodging rooms for the priests, but also store — houses for tithes and offerings. A pavement — A beautiful floor laid with checker works. The whole floor of this court was thus paved. Thirty chambers — That is, fifteen on the south side of the gate, and fifteen on the north side, built over the pavement.