Luke 21:8

"See to it," He replied, "that you are not misled; for many will come assuming my name and professing, 'I am He,' or saying, 'The time is close at hand.' Do not go and follow them.

Matthew 3:2

"Repent," he said, "for the Kingdom of the Heavens is now close at hand."

Matthew 4:17

From that time Jesus began to preach. "Repent," He said, "for the Kingdom of the Heavens is now close at hand."

Ephesians 5:6

Let no one deceive you with empty words, for it is on account of these very sins that God's anger is coming upon the disobedient.

2 Thessalonians 2:3

Let no one in any way deceive you, for that day cannot come without the coming of the apostasy first, and the appearing of the man of sin, the son of perdition, who sets himself against,

Matthew 24:4-5

"Take care that no one misleads you," answered Jesus;

Matthew 24:11

Many false prophets will rise up and lead multitudes astray;

Matthew 24:23-25

"If at that time any one should say to you, 'See, here is the Christ!' or 'Here!' give no credence to it.

Mark 13:5-6

So Jesus began to say to them: "Take care that no one misleads you.

Mark 13:21-23

"At that time if any one says to you, 'See, here is the Christ!' or 'See, He is there!' do not believe it.

Luke 17:23

And they will say to you, 'See there!' 'See here!' Do not start off and go in pursuit.

John 5:43

I have come as my Father's representative, and you do not receive me. If some one else comes representing only himself, him you will receive.

John 8:24

That is why I told you that you will die in your sins; for, unless you believe that I am He, that is what will happen."

Acts 5:36-37

Years ago Theudas appeared, professing to be a person of importance, and a body of men, some four hundred in number, joined him. He was killed, and all his followers were dispersed and annihilated.

Acts 8:9-10

Now for some time past there had been a man named Simon living there, who had been practising magic and astonishing the Samaritans, pretending that he was more than human.

2 Corinthians 11:13-15

For men of this stamp are sham apostles, dishonest workmen, assuming the garb of Apostles of Christ.

2 Thessalonians 2:9-11

The appearing of the Lawless one will be attended by various miracles and tokens and delusive marvels--for so Satan works--

2 Timothy 3:13

But bad men and impostors will go on from bad to worse, misleading and being misled.

1 John 4:1

Dear friends, do not believe every spirit, but put the spirits to the test to see whether they are from God; for many false teachers have gone out into the world.

2 John 1:7

For many deceivers have gone out into the world--men who do not acknowledge Jesus as Christ who has come in human nature. Such a one is 'the deceiver' and 'the anti-Christ.'

Revelation 1:3

Blessed is he who reads and blessed are those who listen to the words of this prophecy and lay to heart what is written in it; for the time for its fulfillment is now close at hand.

Revelation 12:9

The great Dragon, the ancient serpent, he who is called 'the Devil' and 'the Adversary' and leads the whole earth astray, was hurled down: he was hurled down to the earth, and his angels were hurled down 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 as my Father's representative, and you do not receive me. If some one else comes representing only himself, him you will receive.
Acts 5:36
Years ago Theudas appeared, professing to be a person of importance, and a body of men, some four hundred in number, joined him. He was killed, and all his followers were dispersed and annihilated.
Acts 8:9
Now for some time past there had been a man named Simon living there, who had been practising magic and astonishing the Samaritans, pretending that he was more than human.

And the time

Matthew 3:2
"Repent," he said, "for the Kingdom of the Heavens is now close at hand."
Matthew 4:17
From that time Jesus began to preach. "Repent," He said, "for the Kingdom of the Heavens is now close at hand."
Revelation 1:3
Blessed is he who reads and blessed are those who listen to the words of this prophecy and lay to heart what is written in it; for the time for its fulfillment is now close at hand.

General references

Matthew 24:23
"If at that time any one should say to you, 'See, here is the Christ!' or 'Here!' give no credence to it.
Mark 13:21
"At that time if any one says to you, 'See, here is the Christ!' or 'See, He is there!' do not believe it.
Luke 17:23
And they will say to you, 'See there!' 'See here!' Do not start off and go in pursuit.