Ezekiel 10:21

Every one had four faces apiece, and every one four wings; and the likeness of the hands of a man was under their wings.

Every one had four faces apiece. The repetition is in order that the people about to live without the temple might have, instead, the knowledge of the temple mysteries, thus preparing them for a future restoration of the covenant. So perverse were they that they would say, Ezekiel fancies that he saw what has no existence. Therefore, he repeats it over and over again.