Revelation 12:3, 7-9, 12

Then another wonder appeared in heaven: There was a giant red dragon with seven heads and seven crowns on each head. He also had ten horns.

Then there was a war in heaven. Michael and his angels fought against the dragon, and the dragon and his angels fought back. But the dragon was not strong enough, and he and his angels lost their place in heaven. The giant dragon was thrown down out of heaven. (He is that old snake called the devil or Satan, who tricks the whole world.) The dragon with his angels was thrown down to the earth.

So rejoice, you heavens and all who live there! But it will be terrible for the earth and the sea, because the devil has come down to you! He is filled with anger, because he knows he does not have much time.”