Matthew 7:15
Beware of false prophets; they come to you with the garb of sheep but at heart they are ravenous wolves.
2 Timothy 4:3
for the time will come when people will decline to be taught sound doctrine and will accumulate teachers to suit themselves and tickle their own fancies;
2 Peter 2:1-3
Still, false prophets did appear among the People, as among you also there will be false teachers, men who will insinuate destructive heresies, even disowning the Lord who ransomed them; they bring rapid destruction on themselves,
Revelation 19:20
But the Beast was seized, together with the false Prophet who had performed in his presence the miracles by means of which he seduced those who received the mark of the Beast and worshipped his statue; both of them were flung alive into the lake of fire that blazes with brimstone,