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: but do not therefore go after them.

Matthew 3:2

and saying, 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 vain words: for because of these things cometh the wrath of God upon the children of disobedience.

2 Thessalonians 2:3

Let not any one deceive you by any means; for it shall not come till there come an apostasy first, and the man of sin be revealed,

Matthew 24:4-5

And Jesus answered them, See that no one deceive you:

Matthew 24:11

and because iniquity shall abound,

Matthew 24:23-25

Then if any shall say to you, Behold here is the Messiah, or there; believe it not:

Mark 13:5-6

But Jesus answered them and said, Beware least any one deceive you:

Mark 13:21-23

And then if any shall say to you, Behold, here is the Christ, or, Behold, He is there, believe it not:

Luke 17:23

And they will say to you, Behold, He is here, or behold He is there: but go not after them, nor follow them.

John 5:43

I am come in my Father's name, and ye receive me not: if another should come in his own name, him ye will receive.

John 8:24

Therefore I said unto you, that ye shall die in your sins; for if ye believe not that I am the Messiah, ye shall die in your sins.

Acts 5:36-37

For some time ago one Theudas arose, pretending to be some extraordinary person, to whom was joined a number of men, about four hundred: who was slain, and all that followed him were dispersed and came to nothing.

Acts 8:9-10

But there was before in the city a man named Simon practising magic and bewitching the people of Samaria, giving out that he was some great person.

2 Corinthians 11:13-15

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

2 Thessalonians 2:9-11

who comes, through the efficacy of Satan, with all kind of lying power, and signs,

2 Timothy 3:13

But wicked 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 be of God: for many false prophets are gone out into the world.

2 John 1:7

For many deceivers are come out into the world, who disown that Jesus Christ is come in the flesh. Such a one is a deceiver and an antichrist.

Revelation 1:3

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

Revelation 12:9

And the great dragon was cast out, that old serpent, called the devil and Satan, who deceiveth the whole world: he was cast down to the earth, and his angels were cast 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 my Father's name, and ye receive me not: if another should come in his own name, him ye will receive.
Acts 5:36
For some time ago one Theudas arose, pretending to be some extraordinary person, to whom was joined a number of men, about four hundred: who was slain, and all that followed him were dispersed and came to nothing.
Acts 8:9
But there was before in the city a man named Simon practising magic and bewitching the people of Samaria, giving out that he was some great person.

And the time

Matthew 3:2
and saying, 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
Happy is he that readeth, and those that hear the words of the prophecy, and keep the things that are written therein: for the time is near.

General references

Matthew 24:23
Then if any shall say to you, Behold here is the Messiah, or there; believe it not:
Mark 13:21
And then if any shall say to you, Behold, here is the Christ, or, Behold, He is there, believe it not:
Luke 17:23
And they will say to you, Behold, He is here, or behold He is there: but go not after them, nor follow them.