Acts 2:42
and they were constant in listening to the teaching of the Apostles and in their attendance at the Communion, that is, the Breaking of the Bread, and at prayer.
1 Corinthians 15:33-34
Do not deceive yourselves: "Evil companionships corrupt good morals."
2 Corinthians 6:14-18
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?
Hebrews 10:24
And let us bestow thought on one another with a view to arousing one another to brotherly love and right conduct;
Revelation 18:4
Then I heard another voice from Heaven, which said, "Come out of her, My people, that you may not become partakers in her sins, nor receive a share of her plagues.