Revelation
Revelation 12
3 Another sign was seen in heaven there was a great red dragon with seven heads and ten horns, and on his heads were seven royal crowns.
The Codex Vaticanus
Stars and Constellations
Then another sign appeared in heaven: an enormous red dragon with seven heads and ten horns and seven crowns on its heads.
Numerology
red dragon with seven heads - Revelation 12:1-4