Revelation 17:9-11

9 This calls for a mind with wisdom: the seven heads are seven mountains on which the woman is seated; 10 they are also seven kings, five of whom have fallen, one is, the other has not yet come, and when he does come he must remain only a little while. 11 As for the beast that was and is not, it is an eighth but it belongs to the seven, and it goes to destruction.