Revelation 17:8-10

Amplified Bible

⁸ “The beast that you saw was [once], but [now] is not, and he is about to come up out of the abyss (the bottomless pit, the dwelling place of demons) and go to destruction (perdition). And the inhabitants of the earth, whose names have not been written in the Book of Life from the foundation of the world, will be astonished when they see the beast, because he was and is not and is yet to come [to earth].^{(A) 9} Here is the mind which has wisdom [and this is what it knows about the vision]. The seven heads are seven hills on which the woman sits; ¹⁰ and they are seven kings: five of whom have fallen, one exists and is reigning; the other [the seventh] has not yet come, and when he does come, he must remain a little while.