Revelation 13:18

This calls for wisdom; the person who has understanding should calculate the number of the beast, for it is the number of a person. And his number is six hundred and sixty-six.

Revelation 17:9

"This calls for an understanding mind. The seven heads are seven hills on which the woman sits. They are [also] seven kings;

Revelation 21:17

And he measured its wall [and found it to be] two hundred and sixteen feet [high], according to human measurements which the angel was using.

Revelation 15:2

And I saw what seemed to be an ocean of glass, mixed with fire, and those who had been victorious over the beast, his statue and the number of his name. They were standing beside [or, "on"] the ocean of glass and held harps [given to them] by God.

Mark 13:14

"But when you see that disgusting thing that causes total destruction [i.e., the Roman army. See Luke 21:20] standing where it ought not to be [i.e., surrounding the besieged city of Jerusalem], (let the reader understand [what is meant by this]), then those of you in Judea are to run away into the [nearby] mountains.

Romans 3:5

Now if our wrongdoing serves to emphasize more clearly that God does what is right, what should we say about that? Is God being unjust for sending [His] wrath [on the world]? (I am raising a human objection).

Revelation 1:3

The person who reads this [book] and those who listen to the words of this prophecy and who obey what is written in it are blessed, for the time [when some of it will occur] is near. [See verse 1].

Treasury of Scripture Knowledge

Summary

Here is wisdom. Let him that hath understanding count the number of the beast: for it is the number of a man; and his number is Six hundred threescore and six.

Bible References

Here

Revelation 1:3
The person who reads this [book] and those who listen to the words of this prophecy and who obey what is written in it are blessed, for the time [when some of it will occur] is near. [See verse 1].
Revelation 17:9
"This calls for an understanding mind. The seven heads are seven hills on which the woman sits. They are [also] seven kings;
Mark 13:14
"But when you see that disgusting thing that causes total destruction [i.e., the Roman army. See Luke 21:20] standing where it ought not to be [i.e., surrounding the besieged city of Jerusalem], (let the reader understand [what is meant by this]), then those of you in Judea are to run away into the [nearby] mountains.

Count

Revelation 15:2
And I saw what seemed to be an ocean of glass, mixed with fire, and those who had been victorious over the beast, his statue and the number of his name. They were standing beside [or, "on"] the ocean of glass and held harps [given to them] by God.