Charles Ellicott Commentary Ezekiel 46:21

"Then 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." — Ezekiel 46:21 (ASV)

The outer court: The prophet had just been in those chambers which, although they stood within the area of the outer court, were considered as belonging to the inner. He is now brought into the outer court, properly so called.

In every corner of the court there was a court: In each of the angles of the outer court a place was set apart for the boiling of the flesh of the peace offerings. These were of considerable size—40 cubits by 30 (Ezekiel 46:22), and appear to have been enclosed by a wall but not covered above. The word translated joined is of very uncertain meaning, but its most probable sense is enclosed. These courts are marked E on Plan II.