Revelation 17:9

Here [is] the mind that has wisdom: the seven heads are seven mountains {on which the woman sits} and they are seven kings.

Revelation 13:18

Here is wisdom: the one who has understanding, let him calculate the number of the beast, for it is man's number, and his number [is] six hundred sixty-six.

Revelation 17:3

And he carried me away into the wilderness in the Spirit, and I saw a woman seated on a scarlet beast that was full of blasphemous names, having seven heads and ten horns.

Daniel 12:4

But you, Daniel, keep the words secret and seal the scroll until [the] time of [the] end; many will run back and forth and knowledge will increase."

Daniel 12:8-10

Now I myself heard, but I [did] not understand, and I said, "My lord, what [will be the] outcome [of] these [things]?"

Hosea 14:9

Who [is] wise that he can understand these [things]? Who is discerning that he knows them? The ways of Yahweh [are] right, and [the] righteous walk in them; but transgressors stumble in them.

Matthew 13:11

And he answered [and] said to them, "To you it has been granted to know the mysteries of the kingdom of heaven, but to those [people] it has not been granted.

Matthew 24:15

"So when you see the abomination of desolation spoken about by the prophet Daniel standing in the holy place" (let the one who reads understand),

Revelation 13:1

And I saw coming up out of the sea a beast that had ten horns and seven heads, and on its horns ten royal headbands, and on its heads a blasphemous name.

Revelation 17:7

And the angel said to me, "Why are you astonished? I will tell you the mystery of the woman and of the beast that has the seven heads and the ten horns that carries her.

Revelation 17:18

And the woman that you saw is the great city that has sovereignty over the kings of the earth.

Treasury of Scripture Knowledge

Summary

And here is the mind which hath wisdom. The seven heads are seven mountains, on which the woman sitteth.

Bible References

Here

Revelation 13:18
Here is wisdom: the one who has understanding, let him calculate the number of the beast, for it is man's number, and his number [is] six hundred sixty-six.
Daniel 12:4
But you, Daniel, keep the words secret and seal the scroll until [the] time of [the] end; many will run back and forth and knowledge will increase."
Hosea 14:9
Who [is] wise that he can understand these [things]? Who is discerning that he knows them? The ways of Yahweh [are] right, and [the] righteous walk in them; but transgressors stumble in them.
Matthew 13:11
And he answered [and] said to them, "To you it has been granted to know the mysteries of the kingdom of heaven, but to those [people] it has not been granted.
Matthew 24:15
"So when you see the abomination of desolation spoken about by the prophet Daniel standing in the holy place" (let the one who reads understand),

The seven

Revelation 17:3
And he carried me away into the wilderness in the Spirit, and I saw a woman seated on a scarlet beast that was full of blasphemous names, having seven heads and ten horns.
Revelation 13:1
And I saw coming up out of the sea a beast that had ten horns and seven heads, and on its horns ten royal headbands, and on its heads a blasphemous name.