Then there was a war in heaven. Michael and the angels under his command fought the dragon and his angels. And the dragon lost the battle and was forced out of heaven.
New Testament (Rev 12:7-9, 12)

For God did not even spare the angels when they sinned; he threw them into hell, in gloomy caves and darkness until the judgment day.
New Testament (2 Peter 2:4)

How you are fallen from heaven, O shining star, son of the morning!
Old Testament (Isaiah 14:12)

Beware of false prophets who come disguised as harmless sheep, but are really wolves that will tear you apart.
New Testament (Matt 7:15)

This calls for wisdom. If anyone has insight, let him calculate the number of the beast, for it is man’s number. His number is 666.
New Testament (Rev 13:18)

And I saw a beast coming out of the sea. He had ten horns and seven heads, with ten crowns on his horns, and on each head a blasphemous name.
New Testament (Rev 13:1)

Be careful! Watch out for attacks from the Devil, your great enemy. He prowls around like a roaring lion, looking for some victim to devour.
New Testament (1 Peter 5:8)

This is the way it will be at the end of the world. The angels will come and separate the wicked people from the godly, throwing the wicked into the fire.
New Testament (Matt 13:49)

Then I looked and heard the voice of many angels, numbering thousands upon thousands, and ten thousand times ten thousand.
New Testament (Rev 5:11)

Be not forgetful to entertain strangers: for thereby some have entertained angels unaware.
New Testament (Heb 13:2)