Revelation 4:6

4:6 And before the throne [there was] a sea of glass like unto crystal: and in the midst of the throne, and round about the throne, [were] four beasts full of eyes before and behind.

Revelation 4:8

4:8 And the four beasts 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, which was, and is, and is to come.