Revelation 12:9, 11
Revelation 12:9 NKJV
So the great dragon was cast out, that serpent of old, called the Devil and Satan, who deceives the whole world; he was cast to the earth, and his angels were cast out with him.
Revelation 12:11 NKJV
And they overcame him by the blood of the Lamb and by the word of their testimony, and they did not love their lives to the death.