Matthew 7:15
"Beware of the false prophets who come to you in sheep's clothing, but within they are ravening wolves.
2 Timothy 4:3
For a time will come when they will not listen to wholesome teaching, but wanting to have their ears tickled, they will heap up for themselves teachers upon teachers to satisfy their own fancies.
2 Peter 2:1-3
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.
Revelation 19:20
And the beast was seized, and with him the false prophet who performed miracles in his presence to deceive those who had received the brand of the beast, and those who worshiped his image. The two were thrown alive into the lake of fire, blazing with brimstone.