Revelation 4:6
4:6 and in front of the throne was something like a sea of glass, like crystal.
In the middle of the throne and around the throne were four living creatures full of eyes in front and in back.
Revelation 4:8
4:8 Each one of the four living creatures had six wings
and was full of eyes all around and inside.
They never rest day or night, saying:
“Holy Holy Holy is the Lord God, the All-Powerful,
Who was and who is, and who is still to come!”