Revelation 4:6-8

6and before the throne, as a glass sea, like crystal. And in the midst of the throne, and around the throne, four living creatures, full of eyes, before and behind;

7and the first living creature like a lion, and the second living creature like a calf, and the third living creature having the face as of a man, and the fourth living creature like a flying eagle.

8And the four living creatures, each one of them having respectively six wings; round and within they are full of eyes; and they cease not day and night saying, Holy, holy, holy, Lord 1God Almighty, who was, and who is, and who is to come.