Mark 13:6
Many will take my name, and come saying 'I am He', and will lead many astray.
Mark 13:22
For false Christs and false Prophets will arise, and display signs and marvels, to lead astray, were it possible, even God's People.
Matthew 24:5
for, many will take my name, and come saying 'I am the Christ,' and will lead many astray.
Matthew 24:11
Many false Prophets, also, will appear and lead many astray;
Matthew 24:23-24
And, at that time, if any one should say to you 'Look! here is the Christ!' or 'Here 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, you will receive him.
John 8:24
And so I told you that you would die in your sins, for, unless you believe that I am what I am, you will die in your sins."
Acts 5:36-39
For not long ago Theudas appeared, professing to be somebody, and was joined by a body of some four hundred men. But he was killed; and all his followers scattered and dwindled away.
1 John 4:1
Dear friends, do not trust every inspiration, but test each inspiration, to see whether it proceeds from God; because many false Prophets have gone out into the world.