Revelation 17:9

This calls for a mind with wisdom: the seven heads are seven mountains on which the woman is seated;

Revelation 13:18

This calls for wisdom: let the one who has understanding calculate the number of the beast, for it is the number of a man, and his number is 666.

Revelation 17:3

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

Daniel 12:4

But you, Daniel, shut up the words and seal the book, until the time of the end. Many shall run to and fro, and knowledge shall increase."

Daniel 12:8-10

I heard, but I did not understand. Then I said, "O my lord, what shall be the outcome of these things?"

Hosea 14:9

Whoever is wise, let him understand these things; whoever is discerning, let him know them; for the ways of the LORD are right, and the upright walk in them, but transgressors stumble in them.

Matthew 13:11

And he answered them, "To you it has been given to know the secrets of the kingdom of heaven, but to them it has not been given.

Matthew 24:15

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

Revelation 13:1

And I saw a beast rising out of the sea, with ten horns and seven heads, with ten diadems on its horns and blasphemous names on its heads.

Revelation 17:7

But the angel said to me, "Why do you marvel? I will tell you the mystery of the woman, and of the beast with seven heads and ten horns that carries her.

Revelation 17:18

And the woman that you saw is the great city that has dominion 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
This calls for wisdom: let the one who has understanding calculate the number of the beast, for it is the number of a man, and his number is 666.
Daniel 12:4
But you, Daniel, shut up the words and seal the book, until the time of the end. Many shall run to and fro, and knowledge shall increase."
Hosea 14:9
Whoever is wise, let him understand these things; whoever is discerning, let him know them; for the ways of the LORD are right, and the upright walk in them, but transgressors stumble in them.
Matthew 13:11
And he answered them, "To you it has been given to know the secrets of the kingdom of heaven, but to them it has not been given.
Matthew 24:15
"So when you see the abomination of desolation spoken of by the prophet Daniel, standing in the holy place (let the reader understand),

The seven

Revelation 17:3
And he carried me away in the Spirit into a wilderness, and I saw a woman sitting on a scarlet beast that was full of blasphemous names, and it had seven heads and ten horns.
Revelation 13:1
And I saw a beast rising out of the sea, with ten horns and seven heads, with ten diadems on its horns and blasphemous names on its heads.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.