Ezekiel 40:33

Its gate chambers, side pillars, and portico had the same measurements as the others. Both the gateway and its portico had windows all around. It was fifty cubits long and twenty-five cubits wide.

And the little chambers thereof, and the posts thereof, and the arches thereof, were according to these measures: and there were windows therein and in the arches thereof round about: it was fifty cubits long, and five and twenty cubits broad.