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 20:2

20:2 He seized the dragon – the ancient serpent, who is the devil and Satan – and tied him up for a thousand years.