2 John 1:10
If any one comes to you, and does not bring this doctrine; do not receive him into your house, and do not bid him God speed:
Titus 3:10
Reject a heretical man after the first and second admonition;
Galatians 1:8-9
But indeed if we, or an angel from heaven, may preach unto you any other gospel except that which we have preached unto you, let him be accursed.
Romans 16:17-18
But I exhort you, brethren, to mark those who cause divisions and stumblings, contrary to the teaching which you have learned, and depart from them.
1 Corinthians 5:11
For now I have written unto you not to keep company with him, if any one denominated a brother may be a fornicator, or covetous, or an idolater, or a scold, or drunken, or an extortioner; with such a one not to eat.
2 Thessalonians 3:6
And we command you, brethren, in the name of our Lord Jesus Christ, that you withdraw from every brother who walks about disorderly, and not according to the teaching they received from us.
2 Thessalonians 3:14
But if any one does not obey our word through the epistle, note him; do not keep company with him; in order that he may be ashamed;
1 Corinthians 16:22
If any one loves not the Lord as a friend, let him be anathema Maran atha.
2 Timothy 3:5-6
having a form of godliness, but denying the power of the same: and from these turn away.
2 John 1:11
for the one bidding him God speed partakes of his evil deeds.