Revelation 4:8; Revelation 5:1

8 And the four living creatures, each one of them having six wings, are full of eyes around and within; and day and night they do not cease to say, "HOLY, HOLY, HOLY is THE LORD GOD, THE ALMIGHTY, WHO WAS AND WHO IS AND WHO IS TO COME."

1 I saw in the right hand of Him who sat on the throne a book written inside and on the back, sealed up with seven seals.