Matthew 7:15
Beware of false prophets; they come to you with the garb of sheep but at heart they are ravenous wolves.
Matthew 16:6
Jesus said to them, "See and beware of the leaven of the Pharisees and Sadducees."
Matthew 16:12
Then they realized that what he told them to beware of was not leaven but the teaching of the Pharisees and Sadducees.
Mark 4:24
Also he said to them, "Take care what you hear; the measure you deal out to others will be dealt out to yourselves, and you will receive extra.
Mark 7:6-14
He said to them, "Isaiah made a grand prophecy about you hypocrites ??as it is written, This people honours me with their lips, but their heart is far away from me:
John 10:5
they will not follow a stranger, they will run from him, because they do not know the voice of strangers."
2 Corinthians 11:13-15
'Apostles'? They are spurious apostles, false workmen ??they are masquerading as 'apostles of Christ.'
1 Timothy 4:7
Shut your mind against these profane, drivelling myths; train for the religious life.
1 Timothy 6:3-5
Anyone who teaches novelties and refuses to fall in with the sound words of our Lord Jesus Christ and the doctrine that tallies with piety,
2 Peter 2:1-2
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,
1 John 4:1
Do not believe every spirit, beloved, but test the spirits to see if they come from God; for many false prophets have emerged in the world.
2 John 1:10
If anyone comes to you and does not bring this doctrine, do not admit him to the house ??do not even greet him,
Revelation 2:2
I know your doings, your hard work and your patient endurance; I know that you cannot bear wicked men, and that you have tested those who style themselves apostles (no apostles they!) and detected them to be liars;