Luke 21:8

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

Jeremiah 29:8

For thus saith the LORD of hosts, the God of Israel; Let not your prophets and your diviners, that are in the midst of you, deceive you, neither hearken to your dreams which ye cause to be dreamed.

Matthew 3:2

And saying, Repent ye: for the kingdom of heaven is at hand.

Matthew 4:17

From that time Jesus began to preach, and to say, Repent: for the kingdom of heaven is at hand.

Ephesians 5:6

Let no man deceive you with vain words: for because of these things cometh the wrath of God upon the children of disobedience.

2 Thessalonians 2:3

Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;

Matthew 24:4-5

And Jesus answered and said to them, Take heed that no man deceive you.

Matthew 24:11

And many false prophets will rise, and will deceive many.

Matthew 24:23-25

Then if any man shall say to you, Lo, here is Christ, or there; believe it not.

Mark 13:5-6

And Jesus answering them, began to say, Take heed lest any man deceive you:

Mark 13:21-23

And then, if any man shall say to you, Lo, here is Christ; or lo, he is there; believe him not.

Luke 17:23

And they will say to you, See here; or, see there: go not after them, nor follow them.

John 5:43

I am come in my Father's name, and ye receive me not: if another shall come in his own name, him ye will receive.

John 8:24

I said therefore to you, that ye will die in your sins: for if ye believe not that I am he, ye will die in your sins.

Acts 5:36-37

For before these days rose Theudas, boasting himself to be somebody; to whom a number of men, about four hundred, joined themselves: who was slain; and all, as many as obeyed him, were scattered, and brought to naught.

Acts 8:9-10

But there was a certain man called Simon, who before in the same city used sorcery, and bewitched the people of Samaria, giving out that himself was some great one:

2 Corinthians 11:13-15

For such are false apostles, deceitful workers, transforming themselves into the apostles of Christ.

2 Thessalonians 2:9-11

Even him, whose coming is after the working of Satan, with all power, and signs, and lying wonders,

2 Timothy 3:13

But evil men and seducers will become worse and worse, deceiving, and being deceived.

1 John 4:1

Beloved, believe not every spirit, but try the spirits whether they are of God: because many false prophets have gone out into the world.

2 John 1:7

For many deceivers have entered into the world, who confess not that Jesus Christ is come in the flesh. This is a deceiver, and an antichrist.

Revelation 1:3

Blessed is he that readeth, and they that hear the words of this prophecy, and keep those things which are written therein: for the time is at hand.

Revelation 12:9

And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out upon the earth, and his angels were cast out 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 am come in my Father's name, and ye receive me not: if another shall come in his own name, him ye will receive.
Acts 5:36
For before these days rose Theudas, boasting himself to be somebody; to whom a number of men, about four hundred, joined themselves: who was slain; and all, as many as obeyed him, were scattered, and brought to naught.
Acts 8:9
But there was a certain man called Simon, who before in the same city used sorcery, and bewitched the people of Samaria, giving out that himself was some great one:

And the time

Matthew 3:2
And saying, Repent ye: for the kingdom of heaven is at hand.
Matthew 4:17
From that time Jesus began to preach, and to say, Repent: for the kingdom of heaven is at hand.
Revelation 1:3
Blessed is he that readeth, and they that hear the words of this prophecy, and keep those things which are written therein: for the time is at hand.

General references

Matthew 24:23
Then if any man shall say to you, Lo, here is Christ, or there; believe it not.
Mark 13:21
And then, if any man shall say to you, Lo, here is Christ; or lo, he is there; believe him not.
Luke 17:23
And they will say to you, See here; or, see there: go not after them, nor follow them.