Matthew 7:15
"Beware of the false prophets, who come to you disguised as sheep but are ravenous wolves underneath.
Matthew 16:6
And Jesus said to them, "Look out, and be on your guard against the yeast of the Pharisees and Sadducees!"
Matthew 16:12
Then they understood that he was warning them not against yeast but against the teaching of the Pharisees and Sadducees.
Mark 4:24
"Take care what you hear," he said to them. "The measure you give will be given to you, and even more besides.
Mark 7:6-14
But he said to them, "It was about you hypocrites that Isaiah prophesied so finely, in the words, " 'This people honor me with their lips, Yet their hearts are far away from me.
John 10:5
But they will never follow a stranger but will run away from him, because they do not know the voices of strangers."
2 Corinthians 11:13-15
Such men are sham apostles, dishonest workmen, masquerading as apostles of Christ.
Ephesians 4:14
We must not be babies any longer, blown about and swung around by every wind of doctrine through the trickery of men with their ingenuity in inventing error.
1 Timothy 4:7
But let worldly fictions and old wives' tales alone. Train yourself for the religious life.
1 Timothy 6:3-5
Anyone who teaches different views and does not agree with the wholesome instruction which comes from our Lord Jesus Christ, and with religious teaching
2 Peter 2:1-2
There were false prophets too among the people, just as there will be false teachers among you, who will introduce destructive sects and deny the Master who has bought them, thus bringing on themselves swift destruction.
1 John 4:1
Dear friends, do not believe every inspired utterance, but test the utterances to see whether they come from God, for many false prophets have come out into the world.
2 John 1:10
If anyone comes to you without bringing this teaching, do not let him come into the house or bid him good morning.
Revelation 2:2
I know what you have done; your hard work and your endurance. I know that you cannot tolerate wicked men, and that you have tested those who claimed to be apostles when they were not, and have found them to be impostors.