Revelation 4:5-8

And out of the throne proceed lightnings and voices and thunders. And there were seven lamps of fire burning before the throne, which are the seven Spirits of God; and 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. And 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. And 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, is the Lord God, the Almighty, who was and who is and who is to come.