Matthew 7:15
"Beware of the false prophets who come to you in sheep's clothing, but within they are ravening wolves.
Matthew 16:6
Presently Jesus said to them, "Take heed and beware of the leaven of the Pharisees."
Matthew 16:12
Then they realized that he had not told them to beware of the leaven, but of the teaching of the Pharisees and Sadducees.
Mark 4:24
And he said to them. "Take heed what you hear. With what measure you measure it will be measured to you, and more will be given to you.
Mark 7:6-14
"Well did Isaiah prophesy of you, hypocrites," he answered. "As it is written, 'This people honor me with their lips, While their hearts are far from me;
John 10:5
"But a stranger they will not follow, but flee from him, because they do not know the voice of strangers."
2 Corinthians 11:13-15
For such fellows are sham apostles of Christ.
Ephesians 4:14
So we shall no longer be children, tossed up and down, and blown about by every wind of teaching, tricked by the craft of men in the snares of misleading error;
1 Timothy 4:7
Ever reject these profane and old womanish myths; and continually train yourself for the contest of godliness.
1 Timothy 6:3-5
If any one teaches heterodoxy, and refuses to consent to the wholesome words of the Lord Jesus Christ, and to the teachings of religion,
2 Peter 2:1-2
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.
1 John 4:1
Do not believe every spirit, beloved, but test the spirits to see whether they are of God; for many false prophets are gone out into the world.
2 John 1:10
If any one come to you and does not bring this teaching, do not receive him into your house, nor give him any greeting.
Revelation 2:2
I know your works and your toil and stedfastness, and that you cannot endure evil men, and that you tested those who called themselves apostles, though they are not, and how you found them false.