Revelation 5:6-8

And I saw, and behold, in the midst of the throne and the four living creatures, and in the midst of the elders, a Lamb was standing, as if it were slain, having seven horns and seven eyes, which are the seven spirits of God, sent forth to all the earth. And he approached and received the book from the right hand of the One sitting upon the throne. And when he had opened the book, the four living creatures and the twenty-four elders fell down before the Lamb, each having stringed instruments, as well as golden bowls full of fragrances, which are the prayers of the saints.