Revelation 17:9

New English Translation

⁹(This requires^[a] a mind that has wisdom.) The seven heads are seven mountains^[b] the woman sits on. They are also seven kings:

Revelation 17:9 tn Grk “Here is the mind that has wisdom.”
Revelation 17:9 tn It is important to note that the height of “mountains” versus “hills” or other topographical terms is somewhat relative. In terms of Palestinian topography, Mount Tabor (traditionally regarded as the mount of transfiguration) is some 1,800 ft (550 m) above sea level, while the Mount of Olives is only some 100 ft (30 m) higher than Jerusalem.

New English Translation (NET)