4 Bible Verses about Fallen Angels

And Jesus replied: "I have had visions of Satan, fallen, like lightning from the heavens.

Then a battle took place in the heavens. Michael and his angels fought with the Dragon. But though the Dragon, with his angels, fought, he did not prevail; and there was no place left for them any longer in the heavens. Then the great Dragon, the primeval Serpent, known as the 'Devil' and 'Satan,' who deceives all the world, was hurled down to the earth, and his angels were hurled down with him.read more.
And I heard a loud voice in Heaven which said-- 'Now has begun the day of the Salvation, and Power, and Dominion of our God, and the Rule of his Christ; for the Accuser of our Brothers has been hurled down, he who has been accusing them before our God day and night. Their victory was due to the Blood of the Lamb, and to the Message to which they bore their testimony. In their love of life they shrank not from death. Therefore, be glad, O Heaven, and all who live in Heaven! Alas for the earth and for the sea, for the Devil has gone down to you in great fury, knowing that he has but little time.' when the Dragon saw that he was hurled down to the earth, he pursued the woman who had given birth to the male child. But to the woman were given the two wings of the great eagle, so that she might fly to her place in the wilderness, where she is being tended for 'one year, and for two years, and for half a year' in safety from the Serpent. Then the Serpent poured water from its mouth after the woman, like a river, so that it might sweep her away. But Earth came to her help, and opened her mouth and drank up the river which the Dragon had poured out of its mouth. The Dragon was enraged at the woman, and went to fight with the rest of her offspring-- those who lay to heart the commands of God and bear their testimony to Jesus; and he took his stand on the sea-shore.

Remember, God did not spare angels when they sinned, but sent them down to Tartarus, and committed them to caverns of darkness, to be kept under guard for judgment.