'False Prophets' in the Bible

But beware of false prophets, who come to you in sheep's clothing, but within they are rapacious wolves.

and many false prophets shall be raised up and deceive many,

For false Christs and false prophets shall be raised up, and shall show great signs and wonders, so as to deceive, if possible, even the elect.

For false prophets shall arise, and perform miracles and wonders, to deceive, if possible, the elect.

Woe, when all men speak well of you! for in this manner did their fathers of the false prophets.

But there were also false prophets among the people, as there shall also be false teachers among you, who shall bring in by stealth destructive heresies, even denying the master that bought them, bringing on themselves swift destruction;

BELOVED, believe not every spirit, but prove the spirits whether they are of God; for many false prophets have gone out into the world.