Luke 21:8

And he said, "See that you are not led astray. For many will come in my name, saying, 'I am he!' and, 'The time is at hand!' Do not go after them.

Jeremiah 29:8

For thus says the LORD of hosts, the God of Israel: Do not let your prophets and your diviners who are among you deceive you, and do not listen to the dreams that they dream,

Matthew 3:2

"Repent, for the kingdom of heaven is at hand."

Matthew 4:17

From that time Jesus began to preach, saying, "Repent, for the kingdom of heaven is at hand."

Ephesians 5:6

Let no one deceive you with empty words, for because of these things the wrath of God comes upon the sons of disobedience.

2 Thessalonians 2:3

Let no one deceive you in any way. For that day will not come, unless the rebellion comes first, and the man of lawlessness is revealed, the son of destruction,

Matthew 24:4-5

And Jesus answered them, "See that no one leads you astray.

Matthew 24:11

And many false prophets will arise and lead many astray.

Matthew 24:23-25

Then if anyone says to you, 'Look, here is the Christ!' or 'There he is!' do not believe it.

Mark 13:5-6

And Jesus began to say to them, "See that no one leads you astray.

Mark 13:21-23

And then if anyone says to you, 'Look, here is the Christ!' or 'Look, there he is!' do not believe it.

Luke 17:23

And they will say to you, 'Look, there!' or 'Look, here!' Do not go out or follow them.

John 5:43

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

John 8:24

I told you that you would die in your sins, for unless you believe that I am he you will die in your sins."

Acts 5:36-37

For before these days Theudas rose up, claiming to be somebody, and a number of men, about four hundred, joined him. He was killed, and all who followed him were dispersed and came to nothing.

Acts 8:9-10

But there was a man named Simon, who had previously practiced magic in the city and amazed the people of Samaria, saying that he himself was somebody great.

2 Corinthians 11:13-15

For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ.

2 Thessalonians 2:9-11

The coming of the lawless one is by the activity of Satan with all power and false signs and wonders,

2 Timothy 3:13

while evil people and impostors will go on from bad to worse, deceiving and being deceived.

1 John 4:1

Beloved, do not believe every spirit, but test the spirits to see whether they are from God, for many false prophets have gone out into the world.

2 John 1:7

For many deceivers have gone out into the world, those who do not confess the coming of Jesus Christ in the flesh. Such a one is the deceiver and the antichrist.

Revelation 1:3

Blessed is the one who reads aloud the words of this prophecy, and blessed are those who hear, and who keep what is written in it, for the time is near.

Revelation 12:9

And the great dragon was thrown down, that ancient serpent, who is called the devil and Satan, the deceiver of the whole world--he was thrown down to the earth, and his angels were thrown 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 in my Father's name, and you do not receive me. If another comes in his own name, you will receive him.
Acts 5:36
For before these days Theudas rose up, claiming to be somebody, and a number of men, about four hundred, joined him. He was killed, and all who followed him were dispersed and came to nothing.
Acts 8:9
But there was a man named Simon, who had previously practiced magic in the city and amazed the people of Samaria, saying that he himself was somebody great.

And the time

Matthew 3:2
"Repent, for the kingdom of heaven is at hand."
Matthew 4:17
From that time Jesus began to preach, saying, "Repent, for the kingdom of heaven is at hand."
Revelation 1:3
Blessed is the one who reads aloud the words of this prophecy, and blessed are those who hear, and who keep what is written in it, for the time is near.

General references

Matthew 24:23
Then if anyone says to you, 'Look, here is the Christ!' or 'There he is!' do not believe it.
Mark 13:21
And then if anyone says to you, 'Look, here is the Christ!' or 'Look, there he is!' do not believe it.
Luke 17:23
And they will say to you, 'Look, there!' or 'Look, here!' Do not go out or follow them.

The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.