Then war broke out in heaven. Michael and his angels fought against the dragon, and the dragon and his angels fought back.
References for Revelation 12:7
But he was not strong enough, and they lost their place in heaven.
The great dragon was hurled down—that ancient serpent called the devil, or Satan, who leads the whole world astray. He was hurled to the earth, and his angels with him.
References for Revelation 12:9