Treasury of Scripture Knowledge
1 Corinthians 5:2
And you, instead of mourning and removing from among you the man who has done this deed of shame, are filled with self-complacency!
2 Corinthians 6:14
Do not come into close association with unbelievers, like oxen yoked with asses. For what is there in common between righteousness and lawlessness? Or what partnership has light with darkness?
Have nothing to do with the barren unprofitable deeds of darkness, but, instead of that, set your faces against them;
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.
and this led the Pharisees and the Scribes indignantly to complain, saying, "He gives a welcome to notorious sinners, and joins them at their meals!"