2 John 1:10
If any one who comes to you does not bring this teaching, do not receive him under your roof nor bid him Farewell.
Titus 3:10
After a first and second admonition, have nothing further to do with any one who will not be taught;
Galatians 1:8-9
But if even we or an angel from Heaven should bring you a Good News different from that which we have already brought you, let him be accursed.
Romans 16:17-18
But I beseech you, brethren, to keep a watch on those who are causing the divisions among you, and are leading others into sin, in defiance of the instruction which you have received; and habitually to shun them.
1 Corinthians 5:11
But what I meant was that you were not to associate with any one bearing the name of "brother," if he was addicted to fornication or avarice or idol-worship or abusive language or hard-drinking or greed of gain. With such a man you ought not even to eat.
2 Thessalonians 3:6
But, by the authority of the Lord, we command you, brethren, to stand aloof from every brother whose life is disorderly and not in accordance with the teaching which all received from us.
2 Thessalonians 3:14
and if any one refuses to obey these our written instructions, mark that man and hold no communication with him--so that he may be made to feel ashamed.
1 Corinthians 16:22
If any one is destitute of love to the Lord, let him be accursed. OUR LORD IS COMING.
2 Timothy 3:5-6
and will keep up a make-believe of piety and yet live in defiance of its power. Turn away from people of this sort.
2 John 1:11
He who bids him Farewell is a sharer in his evil deeds.