'False Prophets' in the Bible

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

and many false prophets will arise, and deceive many;

For false Christs and false prophets will arise, and will show great signs and wonders, so as to deceive, if possible, even the elect.

For false Christs and false prophets will arise, and will show signs and wonders, in order to lead astray, if possible, even the elect.

Alas for you, when men shall speak well of you! for so did their fathers to the false prophets.

But there were false prophets among the people, as there will be false teachers also among you; and these will stealthily introduce ruinous sects, and deny the Lord that bought them, bringing upon themselves swift destruction:

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