'False Prophets' in the Bible

Beware of false prophets who come to you in sheep's clothing, but inwardly they are ravening wolves.

And many false prophets will rise and deceive many.

For false Christs and false prophets will arise and show great signs and wonders; so much so that, if it were possible, they would deceive even the elect.

For false Christs and false prophets will arise and will give miraculous signs and wonders in order to seduce, if possible, even the elect.

Woe to you when all men shall speak well of you! For so their fathers did to the false prophets.

But there were also false prophets among the people, even as there will be false teachers among you, who secretly will bring in destructive heresies, even denying the Master who bought them, bringing on themselves swift destruction.

Beloved, do not believe every spirit, but try the spirits to see if they are of God, because many false prophets have gone out into the world.