Mark 13:6
Many will come in my name, saying, 'I am he,' and will deceive many.
Mark 13:22
For false christs and false prophets will rise and show signs and wonders to deceive, if possible, even the elect.
Matthew 24:5
For many will come in my name, saying, 'I am the Christ,' and will deceive many.
Matthew 24:11
And many false prophets will rise up and deceive many.
Matthew 24:23-24
Then if any one says to you, 'Look, here is the Christ!' or 'There he is!' do not believe it.
John 5:43
I have come in my Father's name, and you do not receive me; if another comes in his own name, him you will receive.
John 8:24
Therefore I told to you that you would die in your sins; for if you do not believe that I am he, you will die in your sins."
Acts 5:36-39
For some time ago Theudas rose up, claiming to be somebody, and a group of about four hundred men joined him. But he was killed, and all who followed him were dispersed and came to nothing.
1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are of God; because many false prophets have gone out into the world.