Mark 13:21
And then if anyone says to you, 'Look, here is Christ,' or 'Look, there He is,' do not believe him.
Luke 21:8
And He replied, "Pay attention, so that you are not led astray [from the truth]. For many [false teachers] will come, claiming to be me, and saying, 'I am [the Christ],' and 'The time is near.' [But] do not go after them.
Matthew 24:5
For many [false teachers] will come, claiming to be me, and saying, 'I am the Christ [i.e., God's specially chosen one]' and they will lead many people away [from the truth].
Matthew 24:23-25
Then if anyone says to you, 'Look, here is Christ,' or 'There [he is],' do not believe him.
Luke 17:23-24
And people will be saying to you, 'Look, there [He is]! Look, here [He is]! Do not leave or follow after them.
John 5:43
I have come in my Father's name [i.e., by His authority] and you do not accept me. If someone else comes in his own name [i.e., by his own authority], you will accept him.