Cross reference
Revelation 5:2
2 I saw a mighty angel proclaiming with a loud voice, "Who is worthy to open the book, and to break its seals?"
Isaiah 29:11-12
11 All vision is become to you as the words of a book that is sealed, which men deliver to one who is learned, saying, Read this, I pray you; and he says, I can't, for it is sealed:
12 and the book is delivered to him who is not learned, saying, Read this, I pray you; and he says, I am not learned.
Isaiah 41:22-23
22 Let them bring forth, and declare to us what shall happen: declare you the former things, what they are, that we may consider them, and know the latter end of them; or show us things to come.
23 Declare the things that are to come hereafter, that we may know that you are gods: yes, do good, or do evil, that we may be dismayed, and see it together.
Revelation 5:5
5 One of the elders said to me, "Don't weep. Behold, the Lion who is of the tribe of Judah, the Root of David, has overcome; he who opens the book and its seven seals."
Revelation 18:21
21 A mighty angel took up a stone like a great millstone and cast it into the sea, saying, "Thus with violence will Babylon, the great city, be thrown down, and will be found no more at all.
Psalms 103:20
20 Praise Yahweh, you angels of his, Who are mighty in strength, who fulfill his word, Obeying the voice of his word.
Revelation 10:1
1 I saw a mighty angel coming down out of the sky, clothed with a cloud. A rainbow was on his head. His face was like the sun, and his feet like pillars of fire.