Matthew 7:15
But beware of false prophets, who come to you in sheep's clothing, but within they are rapacious wolves.
2 Timothy 4:3
for the time will come when they will not endure sound instruction, but will accumulate for themselves teachers according to their desires, pleasing their ear,
2 Peter 2:1-3
But there were also false prophets among the people, as there shall also be false teachers among you, who shall bring in by stealth destructive heresies, even denying the master that bought them, bringing on themselves swift destruction;
Revelation 19:20
And the beast was taken and with him the false prophet who performed miracles before him, with which he deceived those who received the mark of the beast and those who worship his image; and the two were cast alive into the lake of fire burning with sulphur.