Matthew 7:15
"Beware of the false teachers--men who come to you in sheep's fleeces, but beneath that disguise they are ravenous wolves.
Matthew 24:11
Many false prophets will rise up and lead multitudes astray;
Matthew 24:24
For there will rise up false Christs and false prophets, displaying wonderful signs and prodigies, so as to deceive, were it possible, even God's own People.
2 Timothy 3:8
And just as Jannes and Jambres withstood Moses, so also these false teachers withstand the truth--being, as they are, men of debased intellects, and of no real worth so far as faith is concerned.
2 Timothy 4:14-15
Alexander the metal-worker showed bitter hostility towards me: the Lord will requite him according to his doings.
1 John 5:16
If any one sees a brother man committing a sin which is not unto death, he shall ask and God shall give him life--for those who do not sin unto death. There is such a thing as sin unto death; for that I do not bid him make request.
Revelation 19:20
who had done the miracles in his presence with which he had led astray those who had received the mark of the Wild Beast, and those who worshipped his statue. Both of them were thrown alive into the Lake of fire that was all ablaze with sulphur.