Revelation 5:1

5:1 And I saw in the right hand of him that sat on the throne a book written within and on the backside, sealed with seven seals.

Revelation 5:9

5:9 And they sung a new song, saying, Thou art worthy to take the book, and to open the seals thereof: for thou wast slain, and hast redeemed us to God by thy blood out of every kindred, and tongue, and people, and nation;