Ezekiel 40:13-15

13Then he measured the gateway from the top of the rear wall of one alcove to the top of the opposite one; the distance was twenty-five cubits from one parapet opening to the opposite one.

14He measured along the faces of the projecting walls all around the inside of the gateway—sixty cubits. The measurement was up to the portico facing the courtyard.

15The distance from the entrance of the gateway to the far end of its portico was fifty cubits.