Ezekiel 41:21 - Matthew Poole's English Annotations on the Holy Bible

The posts on each side of the gate or door, both of temple and oracle, were squared; not round, as some other were, and as the posts of the door of the tabernacle were, but of exact square. The face, the form of the door, or gate of the temple, was square, i.e. not arched, as the gates of our churches ordinarily are, but with a flat beam, or upper lintel, laid on the top of the posts, and so either made an equilateral square, or an oblong square. The appearance of the one as the appearance of the other; as was the form of the gate of the temple in its larger, so was the form of the gate of the oracle in its lesser dimensions.