Revelation 5:2
And I saw a strong angel proclaiming with a loud voice, "Who is worthy to open the scroll and break its seals?"
Revelation 5:5
Then one of the elders said to me, "Weep not; behold, the Lion of the tribe of Judah, the Root of David, has conquered, so that he can open the scroll and its seven seals."
Revelation 18:21
Then a mighty angel took up a stone like a great millstone and threw it into the sea, saying, "So will Babylon, the great city, be thrown down with violence, and will not be found any longer.
Revelation 10:1
Then I saw another mighty angel coming down from heaven, wrapped in a cloud, with a rainbow over his head; and his face was like the sun, and his legs like pillars of fire.