Revelation 4:6-9

6And in front of the throne there was a sea of glass like crystal: and in the midst of the throne, and around the throne, were four living beings full of eyes before and behind. 7And the first living being was like a lion, and the second living being like a calf, and the third living being had a face as a man, and the fourth living being was like a flying eagle.

8And the four living beings had each of them six wings about him ; and they were full of eyes within: and they rest not day and night, saying, Holy, holy, holy, Lord God Almighty, who was, and is, and is to come.1 9And when those living beings give glory and honour and thanks to him that is seated on the throne, who liveth for ever and ever,