Revelation 17:9 in the King James Version
And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth.
Context
8 The beast that you saw was, and is not; and is about to come up out of the abyss and to go into destruction. Those who dwell on the earth and whose names have not been written in the book of life from the foundation of the world will marvel when they see that the beast was, and is not, and shall be present.
9 Here is the mind that has wisdom. The seven heads are seven mountains on which the woman sits.
10 They are seven kings. Five have fallen, the one is, and the other has not yet come. When he comes, he must continue a little while.