And the four living creatures 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, who was, and is, and is to come.
All Commentaries on Revelation 4:8 Go To Revelation 4
Tertullian of Carthage
AD 220
Otherwise, when is the name of God not "holy "and "hallowed "through Himself, seeing that of Himself He sanctifies all others-He to whom that surrounding circle of angels cease not to say, "Holy, holy, holy? "