2 John 1:10
If anyone continuously comes to see you without bringing this teaching, you must stop welcoming him to your house and stop bidding him good morning,
Titus 3:10
After one or two warnings to a man who is factious, stop having anything to do with him,
Galatians 1:8-9
But even if I or an angel from heaven preach a good news that is contrary to the one which I have already preached to you, a curse upon him!
Romans 16:17-18
But I beg you, brothers, to keep on the lookout for those who stir up divisions and put hindrances in your way, in opposition to the instruction that you had, and always avoid them.
1 Corinthians 5:11
Now what I really meant was for you to stop associating with any so-called brother, if he is sexually immoral, a greedy grasper, an idolater, a slanderer, a drunkard, or a swindler -- with such a person you must even stop eating.
2 Thessalonians 3:6
Now we charge you, brothers, on the authority of the Lord Jesus Christ, to hold yourselves aloof from any brother who is living as a shirker instead of following the teachings you received from us.
2 Thessalonians 3:14
If anyone refuses to obey what we have said in this letter, mark that person and stop having anything to do with him, so that he will feel ashamed of it.
1 Corinthians 16:22
A curse upon anyone who does not love the Lord! Our Lord is coming.
2 Timothy 3:5-6
keeping up the forms of religion but not giving expression to its power. Avoid such people.
2 John 1:11
For whoever keeps on bidding him good morning is sharing in his wicked works.