Bullock: Symbolical
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Ezekiel 1:10
The form of their faces was that of a man, and each of the four had the face of a lion on the right side, the face of an ox on the left side, and also the face of an eagle.
Revelation 4:7
The first living creature was like a lion, the second like a calf, the third had a face like a man, and the fourth was like an eagle in flight.