'False Prophets' in the Bible

But beware of false prophets, who come to you in sheeps clothing, but inwardly they are ravenous wolves.

And many false prophets shall rise and shall deceive many.

For false Christs and false prophets shall arise and shew great signs and wonders, so that they would deceive (if it were possible) even the elect.

For false Christs and false prophets shall rise, and shall shew signs and wonders, to seduce, if it were possible, even the elect.

Wo to you, when all men shall speak well of you; for so did their fathers to the false prophets.

But there were false prophets also among the people, as there shall likewise be false teachers among you, who will privily bring in destructive heresies, even denying the Lord that bought them, and bring upon themselves swift destruction.

Beloved, believe not every spirit, but try the spirits, whether they are of God, because many false prophets are gone out into the world.