Revelation 12:3-4

12:3 Then another sign appeared in heaven: a huge red dragon that had seven heads and ten horns, and on its heads were seven diadem crowns. 12:4 Now the dragon’s tail swept away a third of the stars in heaven and hurled them to the earth. Then the dragon stood before the woman who was about to give birth, so that he might devour her child as soon as it was born.

Revelation 12:7

War in Heaven

12:7 Then war broke out in heaven: Michael and his angels fought against the dragon, and the dragon and his angels fought back.

Revelation 12:9

12:9 So that huge dragon – the ancient serpent, the one called the devil and Satan, who deceives the whole world – was thrown down to the earth, and his angels along with him.

Revelation 12:16-17

12:16 but the earth came to her rescue; the ground opened up and swallowed the river that the dragon had spewed from his mouth. 12:17 So the dragon became enraged at the woman and went away to make war on the rest of her children, those who keep God’s commandments and hold to the testimony about Jesus. (12:18) And the dragon stood on the sand of the seashore.