Matthew 7:15
"Beware of false prophets, who come to you in sheep's clothing, but inwardly they are ravenous wolves.
Matthew 16:6
Then Jesus said to them, "Take heed and beware of the leaven of the Pharisees and the Sadducees."
Matthew 16:12
Then they understood that he did not tell them to beware of the leaven of bread, but of the teaching of the Pharisees and Sadducees.
Mark 4:24
Then he said to them, "Take heed what you hear. With the measure you use, it will be measured to you; and more will be given you.
Mark 7:6-14
And he said to them, "Well did Isaiah prophesy of you hypocrites; as it is written: 'This people honors me with their lips, but their heart is far from me.
John 10:5
A stranger they will not follow, but they will flee from him, for they do not know the voice of strangers."
2 Corinthians 11:13-15
For such men are false apostles, deceitful workmen, disguising themselves as apostles of Christ.
Ephesians 4:14
As a result, we are no longer to be children, tossed here and there by waves and carried about by every wind of doctrine, by the cunning of men, by their craftiness in deceitful scheming.
1 Timothy 4:7
Have nothing to do with godless myths and old wives' tales; rather, train yourself in godliness.
1 Timothy 6:3-5
If anyone teaches otherwise and does not agree with the sound words of our Lord Jesus Christ and the teaching which accords with godliness,
2 Peter 2:1-2
But false prophets also arose among the people, just as there will also be false teachers among you, who will secretly introduce destructive heresies, even denying the Master who bought them, bringing swift destruction upon themselves.
1 John 4:1
Beloved, do not believe every spirit, but test the spirits to see whether they are of God; because many false prophets have gone out into the world.
2 John 1:10
If anyone comes to you and does not bring this teaching, do not receive him into your house or give him any greeting;
Revelation 2:2
I know your works, your toil and your patient endurance. I know that you cannot bear evil men, but you have tested those who call themselves apostles and are not, and have found them to be false;