Revelation 12:7-9

And there was war in heaven: Michael and his angels going forth to war with the dragon; and the dragon warred and his angels; and they prevailed not, neither was their place found any more in heaven. And the great dragon was cast down, the old serpent, he that is called the Devil and Satan, the deceiver of the whole world; he was cast down to the earth, and his angels were cast down with him.