Luke 21:8

He said, "Watch out that you don't get led astray, for many will come in my name, saying, 'I am he,' and, 'The time is at hand.' Therefore don't follow them.

Jeremiah 29:8

For thus says Yahweh of Armies, the God of Israel: Don't let your prophets who are in the midst of you, and your diviners, deceive you; neither listen to your dreams which you cause to be dreamed.

Matthew 3:2

"Repent, 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 empty words. For because of these things, the wrath of God comes on the children of disobedience.

2 Thessalonians 2:3

Let no one deceive you in any way. For it will not be, unless the departure comes first, and the man of sin is revealed, the son of destruction,

Matthew 24:4-5

Jesus answered them, "Be careful that no one leads you astray.

Matthew 24:11

Many false prophets will arise, and will lead many astray.

Matthew 24:23-25

"Then if any man tells you, 'Behold, here is the Christ,' or, 'There,' don't believe it.

Mark 13:5-6

Jesus, answering, began to tell them, "Be careful that no one leads you astray.

Mark 13:21-23

Then if anyone tells you, 'Look, here is the Christ!' or, 'Look, there!' don't believe it.

Luke 17:23

They will tell you, 'Look, here!' or 'Look, there!' Don't go away, nor follow after them,

John 5:43

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

John 8:24

I said therefore to you that you will 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, making himself out 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 dispersed, and came to nothing.

Acts 8:9-10

But there was a certain man, Simon by name, who used to practice sorcery in the city, and amazed the people of Samaria, making himself out to be some great one,

2 Corinthians 11:13-15

For such men are false apostles, deceitful workers, masquerading as Christ's apostles.

2 Thessalonians 2:9-11

even he whose coming is according to the 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, don't believe every spirit, but test 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 gone out into the world, those who don't confess that Jesus Christ came in the flesh. This is the deceiver and the Antichrist.

Revelation 1:3

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

Revelation 12:9

The great dragon was thrown down, the old serpent, he 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 don't receive me. If another comes in his own name, you will receive him.
Acts 5:36
For before these days Theudas rose up, making himself out 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 dispersed, and came to nothing.
Acts 8:9
But there was a certain man, Simon by name, who used to practice sorcery in the city, and amazed the people of Samaria, making himself out to be some great one,

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, and to say, "Repent! For the Kingdom of Heaven is at hand."
Revelation 1:3
Blessed is he who reads and those who hear the words of the prophecy, and keep the things that are written in it, for the time is at hand.

General references

Matthew 24:23
"Then if any man tells you, 'Behold, here is the Christ,' or, 'There,' don't believe it.
Mark 13:21
Then if anyone tells you, 'Look, here is the Christ!' or, 'Look, there!' don't believe it.
Luke 17:23
They will tell you, 'Look, here!' or 'Look, there!' Don't go away, nor follow after them,