Revelation 17:9-12

9This calls for a mind with wisdom: the seven heads are seven mountains on which the woman is seated;

10they 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.

11As for the beast that was and is not, it is an eighth but it belongs to the seven, and it goes to destruction.

12And the ten horns that you saw are ten kings who have not yet received royal power, but they are to receive authority as kings for one hour, together with the beast.