Mark 13:21

And then if any one says to you, Behold the Christ is here! Behold there! believe it not.

Luke 21:8

And he said, See that you be not deceived; for many shall come in my name, saying, I am [Christ], and the time is at hand; go not after them.

Matthew 24:5

for many shall come in my name, saying, I am the Christ, and shall deceive many.

Matthew 24:23-25

Then if one says to you, Behold, here is the Christ, or there! believe it not.

Luke 17:23-24

And they shall say to you, Behold there! behold here! go not away, nor follow them.

John 5:43

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

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

Matthew 24:5
for many shall come in my name, saying, I am the Christ, and shall deceive many.
Luke 17:23
And they shall say to you, Behold there! behold here! go not away, nor follow them.
Luke 21:8
And he said, See that you be not deceived; for many shall come in my name, saying, I am [Christ], and the time is at hand; go not after them.
John 5:43
I have come in my Father's name and you receive me not; if another comes in his own name, him will you receive.