2 Thessalonians 1:7
and to provide [future] rest for you, along with us, who are afflicted. [This will occur] when Jesus is revealed from heaven in blazing fire [i.e., at His second coming], accompanied by His mighty angels.
2 Peter 2:11
while [those] angels, who are greater in strength and power than they, refuse to speak against such authorities, in condemnation, before the Lord.
Revelation 10:1
And I saw another mighty angel coming down from heaven. He was covered by a cloud and there was a rainbow above his head. His face was like the sun and his legs were like pillars of fire.
Revelation 18:21
Then a mighty angel picked up a rock the size of a huge millstone and threw it into the ocean, saying, "This is how the great city of Babylon will be violently thrown down and will never be found again.