Revelation 12:9-11

9 The great dragon was thrown down, the old serpent, he who is called the devil and Satan, the deceiver of the whole world. He was thrown down to the earth, and his angels were thrown down with him.  10 I heard a loud voice in heaven, saying, "Now is come the salvation, the power, and the Kingdom of our God, and the authority of his Christ; for the accuser of our brothers has been thrown down, who accuses them before our God day and night.  11 They overcame him because of the Lamb's blood, and because of the word of their testimony. They didn't love their life, even to death. 

Revelation 19:12

12 His eyes are a flame of fire, and on his head are many crowns. He has names written and a name written which no one knows but he himself.