Revelation 5:2
and I saw a mighty angel who was proclaiming in a loud voice-- 'Who is worthy to open the book and break its seals?'
Revelation 5:5
But one of the Councillors said to me--'Do not weep. The Lion conquered--the Lion of the tribe of Judah, the Scion of David--and can therefore open the book with its seven seals.'
Revelation 18:21
Then a mighty angel took up a stone like a great millstone, and threw it into the sea, crying-- 'So shall Babylon, the Great City, be violently overthrown, never more to be seen.
Revelation 10:1
Then I saw another mighty angel, descending from Heaven. His robe was a cloud; over his head was the rainbow; his face was like the sun, and his feet like pillars of fire;