"And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
And prevailed not; neither was there place found any more in heaven.
And the great dragon was cast out, that old serpent called the Devil, and Satan, which deceived the whole world; he was cast out into the earth, and his angels were cast out with him."
Revelation of John 12:7-9.
Biblical references of dragons:
Deuteronomy 33 – Their wine is the poison of dragons, and the cruel venom of asps.
Psalm 44 – Though thou hast sore broken us in the place of dragons, and covered us with the shadow of death.
Psalm 74:13, 14 Though didst divide the sea by thy strength: thou brakest the heads of the dragons in the waters. Thou brakest the heads of leviathan in pieces…
Psalm
