Revelation 4:6-9

6and before the throne, as it were a sea of glass like unto crystal; and in the midst of the throne, and round about the throne, four living creatures full of eyes before and behind. 7And the first creature was like a lion, and the second creature like a calf, and the third creature had a face as of a man, and the fourth creature was like a flying eagle. 8And the four living creatures, having each one of them six wings, are full of eyes round about and within: and they have no rest day and night, saying,

Holy, holy, holy, isthe Lord God, the Almighty, who was and who is and who is to come.

9And when the living creatures shall give glory and honor and thanks to him that sitteth on the throne, to him that liveth for ever and ever,