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.
Titus 3:10
After a first and second admonition, refuse a man who is causing divisions;
Galatians 1:8-9
But even though I myself or an angel from heaven were to preach any gospel other than that which I did preach to you, let him be accursed.
Romans 16:17-18
I exhort you, brothers, to keep watch of those who are causing the divisions among you, and occasions of stumbling, contrary to the teaching which you have learned.
1 Corinthians 5:11
But what I wrote was that you were not to associate with any so-called brother who is immoral, or avaricious, or idolatrous, or abusive, or a drunkard, or an extortioner. No, with such persons do not even sit at table.
2 Thessalonians 3:6
I summon you, in the name of the Lord Jesus Christ, to shun any brother who leads an idle and disorderly life, which is not according to the rule you received from me.
2 Thessalonians 3:14
If any man does not give heed to what I have said in this letter, mark that man; do not associate with him, so as to make him feel ashamed;
1 Corinthians 16:22
If any one does not love the Lord, let him be accursed. Our Lord is coming.
2 Timothy 3:5-6
For although they keep up the outward form of religion, they deny its power.
2 John 1:11
For the man who greets him shares in his wicked work.