Revelation 17:9

Overview - Revelation 17
1	A woman arrayed in purple and scarlet, with a golden cup in her hand sits upon the beast;
5	which is great Babylon, the mother of all abominations.
9	The interpretation of the seven heads;
12	and the ten horns.
14	The victory of the Lamb.
16	The punishment of the whore.

Revelation 17:9  (King James Version)
And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth.