Ezekiel 40:21

Its three gate chambers on each side, its side pillars, and its portico all had the same measurements as the first gate: fifty cubits long and twenty-five cubits wide.

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.