Titus 3:10
After the first and second warning, reject a man of heresy,
Romans 16:17
And I exhort you, brothers, to watch those making divisions and offenses contrary to the doctrine which you have learned, and avoid them.
2 John 1:10
If anyone comes to you and does not bring this doctrine, do not receive him into your house, nor speak a greeting to him.
Matthew 18:15-17
But if your brother shall trespass against you, go and tell him his fault between you and him alone. If he hears you, you have gained your brother.
1 Corinthians 5:4-13
in the name of our Lord Jesus Christ, when you are gathered together, with my spirit; also, with the power of our Lord Jesus Christ;
1 Corinthians 11:19
For there must also be heresies among you, that the approved ones may be revealed among you.
2 Corinthians 13:2
I told you before, and I say beforehand, as being present the second time and being absent now. I write to those who sinned before, and to all the rest, that if I come again, I will not spare.
Galatians 5:12
I wish that those causing you to doubt will cut themselves off.
Galatians 5:20
idolatry, sorcery, hatreds, fightings, jealousies, angers, rivalries, divisions, heresies,
2 Thessalonians 3:6
Now we command you, brothers, in the name of our Lord Jesus Christ, that you withdraw yourselves from every brother who walks disorderly, and not after the teaching which he received from us.
2 Thessalonians 3:14
And if anyone does not obey our word by this letter, mark that one and have no company with him, that he may be ashamed.
2 Timothy 3:5
having a form of godliness, but denying the power of it; even turn away from these.
2 Peter 2:1
But there were also false prophets among the people, even as there will be false teachers among you, who secretly will bring in destructive heresies, even denying the Master who bought them, bringing on themselves swift destruction.