2 John 1:10
whoever comes to you unaccompanied with this doctrine, don't admit him to your house, nor treat him with the common term of civility.
Titus 3:10
A man that is an heretick, after the first and second admonition, avoid:
Galatians 1:8-9
but tho' I, or an angel from heaven should preach any thing to you for gospel, different from the gospel I have preached unto you, let him be accursed.
Romans 16:17-18
Now I beseech you, brethren, mark those who cause divisions and revolts against the doctrine which you have learned; and avoid them.
1 Corinthians 5:11
but my meaning was, not to keep company with any christian known to be vicious, or covetous, or an idolater, or a railer, or a drunkard, or rapacious, no not even to eat with such a one.
2 Thessalonians 3:6
We direct you, brethren, in the name of our Lord Jesus Christ, to withdraw from all those of your brethren, whose conduct is irregular, and not agreeable to the instructions they received from us.
2 Thessalonians 3:14
and if any one should disregard what we have prescrib'd, signify it to us by letter, and don't converse with him, that he may be put to shame.
1 Corinthians 16:22
If any man love not the Lord Jesus Christ, let him be accurst.
2 Timothy 3:5-6
of which they wear the appearance, but disclaim its influence. have no intercourse with such.
2 John 1:11
for he who shows that respect to such a man, is accessary to his wicked actions.