Mark 13:21

Then if anyone says to you, ‘Look, here is the Christ (the Messiah, the Anointed)!’ or, ‘Look, He is there!’ do not believe it;

Luke 21:8

He said, “Be careful and see to it that you are not misled; for many will come in My name [appropriating for themselves the name Messiah which belongs to Me alone], saying, ‘I am He,’ and, ‘The time is near!’ Do not follow them.

Deuteronomy 13:1-3

“If a prophet arises among you, or a dreamer of dreams, and gives you a sign or a wonder,

Matthew 24:5

For many will come in My name [misusing it, and appropriating the strength of the name which belongs to Me], saying, ‘I am the Christ (the Messiah, the Anointed),’ and they will mislead many.

Matthew 24:23-25

Then if anyone says to you [during the great tribulation], ‘Look! Here is the Christ,’ or ‘There He is,’ do not believe it.

Luke 17:23-24

They will say to you, ‘Look [the Messiah is] there!’ or ‘Look [He is] here!’ Do not go away [to see Him], and do not run after them.

John 5:43

I have come in My Father’s name and with His power, and you do not receive Me [because your minds are closed]; but if another comes in his own name and with no authority or power except his own, you will receive him and give your approval to an imposter.

Treasury of Scripture Knowledge

Summary

And then if any man shall say to you, Lo, here is Christ; or, lo, he is there; believe him not:

Bible References

General references

Deuteronomy 13:1
“If a prophet arises among you, or a dreamer of dreams, and gives you a sign or a wonder,
Matthew 24:5
For many will come in My name [misusing it, and appropriating the strength of the name which belongs to Me], saying, ‘I am the Christ (the Messiah, the Anointed),’ and they will mislead many.
Luke 17:23
They will say to you, ‘Look [the Messiah is] there!’ or ‘Look [He is] here!’ Do not go away [to see Him], and do not run after them.
Luke 21:8
He said, “Be careful and see to it that you are not misled; for many will come in My name [appropriating for themselves the name Messiah which belongs to Me alone], saying, ‘I am He,’ and, ‘The time is near!’ Do not follow them.
John 5:43
I have come in My Father’s name and with His power, and you do not receive Me [because your minds are closed]; but if another comes in his own name and with no authority or power except his own, you will receive him and give your approval to an imposter.