Revelation 12:7-9

7And there was war in the heaven: Michael and his angels went to war with the dragon. And the dragon fought, and his angels;

8and he prevailed not, nor was their place found any more in the heaven.

9And the great dragon was cast out, the ancient serpent, he who is called Devil and Satan, he who deceives the whole habitable world, he was cast out into the earth, and his angels were cast out with him.