Also in front of the throne there was what looked like a sea of glass, clear as crystal. Surrounding the throne on each of its sides, were four living creatures covered with eyes in front and behind.
Each one of the four living creatures had six wings, and they were covered with eyes, inside and out. Day and night they never stop singing: "Holy, holy, holy, is the Lord God Almighty, who was, who is, and who is to come."