Hesekiel 40:21

Också den hade tre vaktkamrar på var sida samt pelare och förhus, lika stora som den förra portens. Den var 50 alnar [26 meter] lång och 25 alnar [13 meter] bred.

And the little chambers thereof were three on this side and three on that side; and the posts thereof and the arches thereof were after the measure of the first gate: the length thereof was fifty cubits, and the breadth five and twenty cubits.