1 Corinthians 15:33

Be not deceived; evil companionships corrupt good morals.

2 Corinthians 6:14-17

Become not unequally yoked with unbelievers; for what fellowship have righteousness and lawlessness? And what communion has light with darkness?

Ephesians 5:11

and have no fellowship with the unfruitful works of darkness, but rather even reprove them;

Treasury of Scripture Knowledge

Summary

That ye come not among these nations, these that remain among you; neither make mention of the name of their gods, nor cause to swear by them, neither serve them, nor bow yourselves unto them:

Bible References

That ye come

1 Corinthians 15:33
Be not deceived; evil companionships corrupt good morals.
2 Corinthians 6:14
Become not unequally yoked with unbelievers; for what fellowship have righteousness and lawlessness? And what communion has light with darkness?
Ephesians 5:11
and have no fellowship with the unfruitful works of darkness, but rather even reprove them;