Luke 21:8

And he said, Take heed that ye be not deceived: for many shall come in my name, saying, I am the Christ: And the time is near.

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 one deceive you with vain words; for because of these things the wrath of God cometh upon the sons of disobedience.

2 Thessalonians 2:3

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

Matthew 24:4-5

And Jesus answering said, Take heed that no man deceive you.

Matthew 24:11

And many false prophets shall rise and shall deceive many.

Matthew 24:23-25

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

Mark 13:5-6

And Jesus answering said, Take heed lest any deceive you.

Mark 13:21-23

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

Luke 17:23

And when they shall say to you, See here; see there: go not, nor follow them.

John 5:43

if another shall come in his own name, him ye will receive.

John 8:24

Therefore I said, Ye shall die in your sins; for if ye believe not, that I am, ye shall die in your sins.

Acts 5:36-37

For before these days rose up Theudas, boasting himself to be somebody, to whom was joined a number of men, about four hundred, who was slain, and all who hearkened to him were scattered and came to nothing.

Acts 8:9-10

But a certain man, named Simon, had been before in the city, using magic, and astonishing the Samaritans, saying, that he was some great one.

2 Corinthians 11:13-15

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

2 Thessalonians 2:9-11

Whose coming is after the mighty working of Satan, with all power and signs and lying wonders,

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 try the spirits, whether they are of God, because many false prophets are gone out into the world.

2 John 1:7

For many seducers are entered into the world, who confess not Jesus Christ that came in the flesh.

Revelation 1:3

Happy is he that readeth, and they that hear the words of this prophecy, and keep the things which are written therein: for the time is near.

Revelation 12:9

And the great dragon was cast out, the antient serpent, who is called the devil and satan, who deceiveth the whole world: he was cast out unto 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
if another shall come in his own name, him ye will receive.
Acts 5:36
For before these days rose up Theudas, boasting himself to be somebody, to whom was joined a number of men, about four hundred, who was slain, and all who hearkened to him were scattered and came to nothing.
Acts 8:9
But a certain man, named Simon, had been before in the city, using magic, and astonishing the Samaritans, saying, that he 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
Happy is he that readeth, and they that hear the words of this prophecy, and keep the things which are written therein: for the time is near.

General references

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