Revelation 5:1, 9

Then I saw a scroll in the right hand of the one who was sitting on the throne. There was writing on the inside and the outside of the scroll, and it was sealed with seven seals.

And they sang a new song with these words: “You are worthy to take the scroll and break its seals and open it. For you were slaughtered, and your blood has ransomed people for God from every tribe and language and people and nation.