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 up, and will do signs and wonders, to lead astray, if possible, the chosen.
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 arise, and will deceive many.
Matthew 24:23-24
Then if any one say to you, Lo! here is the Christ; or there, believe him not.
John 5:43
I have come in my Fathers name, and ye receive me not; if another come in his own name, him ye will receive.
John 8:24
Therefore I said to you, that ye will die in your sins; for unless ye believe that I am He, ye will die in your sins.
Acts 5:36-39
For before these days arose Theudas, boasting himself to be somebody; to whom a number of men, about four hundred, joined themselves: who was slain, and all, as many as obeyed him, were scattered, and came to nought.
1 John 4:1
Beloved, believe not every spirit, but try the spirits, whether they are of God; because many false prophets have gone forth into the world.