Revelation 17:9

And here is the meaning which has wisdom. The seven heads are seven mountains, on which the woman sits.

Revelation 13:18

Here is wisdom. Let him that has understanding count the number of the beast: for the number of man; and its number is six hundred sixty-six.

Revelation 17:3

So he carried me away in the spirit into the wilderness: and I saw a woman seated upon a scarlet-coloured beast, full of names of blasphemy, having seven heads and ten horns.

Daniel 12:4

But thou, O Daniel, shut up the words, and seal the book until the time of the end: many shall pass by, and knowledge shall be multiplied.

Daniel 12:8-10

And I heard, but I did not understand; then I said, O my Lord, what is the fulfillment of these things?

Hosea 14:9

Who is wise that he might understand this? and prudent that he might know this? for the ways of the LORD are right, and the just shall walk in them; but the rebellious shall fall therein.

Matthew 13:11

He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of the heavens, but to them it is not given.

Matthew 24:15

Therefore, when ye see the abomination of desolation, spoken of by Daniel the prophet, which shall stand in the holy place (whosoever reads, let him understand),

Revelation 13:1

And I stood upon the sand of the sea and saw a beast rise up out of the sea, having seven heads and ten horns, and upon its horns ten crowns, and upon its heads the name of blasphemy.

Revelation 17:7

And the angel said unto me, Why didst thou marvel? I will tell thee the mystery of the woman and of the beast that carries her, which has the seven heads and ten horns.

Revelation 17:18

And the woman which thou hast seen is that great city, which reigns 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. Let him that has understanding count the number of the beast: for the number of man; and its number is six hundred sixty-six.
Daniel 12:4
But thou, O Daniel, shut up the words, and seal the book until the time of the end: many shall pass by, and knowledge shall be multiplied.
Hosea 14:9
Who is wise that he might understand this? and prudent that he might know this? for the ways of the LORD are right, and the just shall walk in them; but the rebellious shall fall therein.
Matthew 13:11
He answered and said unto them, Because it is given unto you to know the mysteries of the kingdom of the heavens, but to them it is not given.
Matthew 24:15
Therefore, when ye see the abomination of desolation, spoken of by Daniel the prophet, which shall stand in the holy place (whosoever reads, let him understand),

The seven

Revelation 17:3
So he carried me away in the spirit into the wilderness: and I saw a woman seated upon a scarlet-coloured beast, full of names of blasphemy, having seven heads and ten horns.
Revelation 13:1
And I stood upon the sand of the sea and saw a beast rise up out of the sea, having seven heads and ten horns, and upon its horns ten crowns, and upon its heads the name of blasphemy.