Revelation 4:6-7

6and in front of the throne there was something like a sea or large expanse of glass, like [the clearest] crystal. In the center and around the throne were four living creatures who were full of eyes in front and behind [seeing everything and knowing everything that is around them].

7The first living creature was like a lion, the second creature like a calf (ox), the third creature had the face of a man, and the fourth creature was like a flying eagle.