Revelation 4:6–8

6 and before the throne there is as it were a sea of glass, like crystal.

And round the throne, on each side of the throne, are four living creatures, full of eyes in front and behind: 7 the first living creature like a lion, the second living creature like an ox, the third living creature with the face of a man, and the fourth living creature like a flying eagle. 8 And the four living creatures, each of them with six wings, are full of eyes all round and within, and day and night they never cease to sing,

“Holy, holy, holy, is the Lord God Almighty,

who was and is and is to come!”