Matthew Poole and continuators on Ezekiel 46:21

21 Then he brought me forth into the utter 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 .

Either the court of the people, or more likely the court of the Priests, or Levites, called here utter court, because it was more outward then the court of the Temple.

To go about the whole square of the court.

Where the side Walls did meet in right angles.

A smaller court made up on the outersides with the walls of the greater square, and on the inside made with two walls, the one forty cubits long, the other thirty cubits broad.

Marginal references: Heb. A court in a corner of a court, and a court in a corner of a court.