'False Prophets' in the Bible

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

Many false prophets will arise, and will lead many astray.

For there will arise false christs, and false prophets, and they will show great signs and wonders, so as to lead astray, if possible, even the chosen ones.

For there will arise false christs and false prophets, and will show signs and wonders, that they may lead astray, if possible, even the chosen ones.

Woe, when men speak well of you, for their fathers did the same thing to the false prophets.

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

Beloved, don't believe every spirit, but test the spirits, whether they are of God, because many false prophets have gone out into the world.