Luke 21:8

And he said, See that you be not deceived; for many shall come in my name, saying, I am [Christ], and the time is at hand; go not after them.

Matthew 3:2

Change your minds, for the kingdom of Heaven is at hand.

Matthew 4:17

From that time Jesus began to preach, and to say, Change your minds; for the kingdom of heaven is at hand.

Ephesians 5:6

Let no man deceive you with vain words; for on account of these comes the wrath of God on the children of disobedience.

2 Thessalonians 2:3

Let no one deceive you in any way, for [he shall not come] unless the apostacy comes first, and the man of sin is revealed, the son of destruction,

Matthew 24:4-5

And Jesus answered and said to them, See that no man deceives you;

Matthew 24:11

and many false prophets shall be raised up and deceive many,

Matthew 24:23-25

Then if one says to you, Behold, here is the Christ, or there! believe it not.

Mark 13:5-6

And Jesus said to them, See that no man deceives you;

Mark 13:21-23

And then if any one says to you, Behold the Christ is here! Behold there! believe it not.

Luke 17:23

And they shall say to you, Behold there! behold here! go not away, nor follow them.

John 5:43

I have come in my Father's name and you receive me not; if another comes in his own name, him will you receive.

John 8:24

Therefore I said to you, You shall die in your sins; for if you believe not that I am [the Christ], you shall die in your sins.

Acts 5:36-37

For before these days Theudas arose, saying that he was somebody, to whom a number of men, about four hundred, adhered, who was destroyed, and all who obeyed him passed away and came to nothing.

Acts 8:9-10

And there was a man by the name of Simon who formerly practised magic in that city, and astonished the nation of Samaria, saying that he was some great person,

2 Corinthians 11:13-15

For such false apostles, deceitful laborers, transform themselves into apostles of Christ.

2 Thessalonians 2:9-11

whose coming is according to the power of Satan, with all power and miracles and false prodigies

2 Timothy 3:13

But evil men and impostors will grow worse and worse, deceiving and being deceived.

1 John 4:1

BELOVED, believe not every spirit, but prove the spirits whether they are of God; for many false prophets have gone out into the world.

2 John 1:7

For many deceivers have gone out into the world, who do not confess Jesus Christ coming in the flesh; this is the deceiver, and the antichrist.

Revelation 1:3

Blessed is he that reads, and those that hear the words of the prophecy, and keep the things written in it; for the time is at hand.

Revelation 12:9

And the great dragon, the old serpent, who is called the devil and Satan, and who deceives all the world, was cast to the earth, and his angels were cast [to the earth] with him.

Treasury of Scripture Knowledge

Summary

And he said, Take heed that ye be not deceived: for many shall come in my name, saying, I am Christ; and the time draweth near: go ye not therefore after them.

General references

Bible References

For

John 5:43
I have come in my Father's name and you receive me not; if another comes in his own name, him will you receive.
Acts 5:36
For before these days Theudas arose, saying that he was somebody, to whom a number of men, about four hundred, adhered, who was destroyed, and all who obeyed him passed away and came to nothing.
Acts 8:9
And there was a man by the name of Simon who formerly practised magic in that city, and astonished the nation of Samaria, saying that he was some great person,

And the time

Matthew 3:2
Change your minds, for the kingdom of Heaven is at hand.
Matthew 4:17
From that time Jesus began to preach, and to say, Change your minds; for the kingdom of heaven is at hand.
Revelation 1:3
Blessed is he that reads, and those that hear the words of the prophecy, and keep the things written in it; for the time is at hand.

General references

Matthew 24:23
Then if one says to you, Behold, here is the Christ, or there! believe it not.
Mark 13:21
And then if any one says to you, Behold the Christ is here! Behold there! believe it not.
Luke 17:23
And they shall say to you, Behold there! behold here! go not away, nor follow them.