'False Prophets' in the Bible

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

Many false prophets will rise up and mislead many;

For false christs and false prophets will arise, and will work great signs and wonders, so as to mislead, if it were possible, the very elect.

for false Christs and false prophets will arise and will show signs and wonders, to lead astray the very chosen, if they can.

"Woe to you when all men shall speak well of you! For even so did their fathers to the false prophets.

But there were false prophets, too, among the people, just as among you also there will be false teachers. These will secretly bring in destructive sects, denying even the Master who bought them, and bringing swift ruin upon themselves.

Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.