Ezekiel 46:21-23

21And he brought me forth into the outer court, and caused me to pass by the four corners of the court; and behold, in every corner of the court there was a court.

22In the four corners of the court there were enclosed courts, forty [cubits] long and thirty broad: these four corner courts were of one measure.

23And there was a row [of building] round about in them, round about those four, and it was made with boiling places under the rows round about.