Ezekiel 40:33

and its lodges, and its posts, and its arches, according to these measures: and there were windows therein and in its arches all around; it was fifty cubits long, and twenty-five cubits broad.

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.