Luke 21:8

"Take heed," he answered, "that you are not led astray, for many will come in my name, saying, 'I am he,' and 'The time is close at hand.' Do not go and follow them.

Matthew 3:2

"Repent," said he, "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 near."

Ephesians 5:6

Let no man deceive you with empty arguments, for it is these vices that bring down the wrath of God upon the sons of disobedience;

2 Thessalonians 2:3

Let no one deceive you by any means. For it will not come until after the Great Apostasy, and the revealing of the Man of Sin, the son of perdition,

Matthew 24:4-5

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

Matthew 24:11

Many false prophets will rise up and mislead many;

Matthew 24:23-25

"If at that time any one should say to you, 'See, here is the Christ!' or 'There he is!' believe him not.

Mark 13:5-6

So Jesus began to tell them.

Mark 13:21-23

"At that time if any one tell you, 'See, here is Christ,' or 'See, there he is,' do not believe it;

Luke 17:23

"And they shall say to you, 'Lo there! Lo there!' But do not go away or follow them.

John 5:43

"I am come in the name of my Father and you do not receive me. If another comes in his own name, him you will receive.

John 8:24

"That is why I said that you would die in your sins. For if you do not believe that I am He, you will die in your sins."

Acts 5:36-37

"Years ago Theudas arose, claiming to be somebody, and was joined by about four hundred men. He was killed, and all of his followers dispersed and annihilated.

Acts 8:9-10

Now for some time a man named Simon had been practicing sorcery in that city, and had amazed the people of Samaria. He gave himself out to be some great person.

2 Corinthians 11:13-15

For such fellows are sham apostles of Christ.

2 Thessalonians 2:9-11

even he whose coming is according to the energy of Satan, in every power and sign and lying wonder,

2 Timothy 3:13

But wicked men and impostors will go on from bad to worse, deceiving others, and being themselves deceived.

1 John 4:1

Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.

2 John 1:7

I say this because many deceivers are gone forth into the world, those who deny the coming of Jesus Christ in the flesh. This is the deceiver and the Antichrist.

Revelation 1:3

Blessed is he who reads, and they who hear the words of the prophecy, and keep what is written in it. For the crisis is at hand.

Revelation 12:9

Now the great dragon was thrown down??hat 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 am come in the name of my Father and you do not receive me. If another comes in his own name, him you will receive.
Acts 5:36
"Years ago Theudas arose, claiming to be somebody, and was joined by about four hundred men. He was killed, and all of his followers dispersed and annihilated.
Acts 8:9
Now for some time a man named Simon had been practicing sorcery in that city, and had amazed the people of Samaria. He gave himself out to be some great person.

And the time

Matthew 3:2
"Repent," said he, "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 near."
Revelation 1:3
Blessed is he who reads, and they who hear the words of the prophecy, and keep what is written in it. For the crisis is at hand.

General references

Matthew 24:23
"If at that time any one should say to you, 'See, here is the Christ!' or 'There he is!' believe him not.
Mark 13:21
"At that time if any one tell you, 'See, here is Christ,' or 'See, there he is,' do not believe it;
Luke 17:23
"And they shall say to you, 'Lo there! Lo there!' But do not go away or follow them.