'False Prophets' in the Bible

Be on the watch for false prophets, who come to you in sheep's clothing, but inside they are cruel wolves.

And a number of false prophets will come, causing error.

For there will come up false Christs, and false prophets, who will do great signs and wonders; so that if possible even the saints might be tricked.

Because there will be false Christs and false prophets, and they will give signs and wonders in the hope of turning even the saints from the true way.

Unhappy are you when all men give you their approval: for so their fathers did to the false prophets.

But there were false prophets among the people, as there will be false teachers among you, who will secretly put forward wrong teachings for your destruction, even turning away from the Lord who gave himself for them; whose destruction will come quickly, and they themselves will be the cause of it.

My loved ones, do not put your faith in every spirit, but put them to the test, to see if they are from God: because a great number of false prophets have gone out into the world.