1 Corinthians 15:33

Be not deceived: Evil communications corrupt good manners.

Ephesians 5:11

and do not participate in the unfruitful works of darkness, but rather even reprove them;

Titus 1:15

To the pure, all things are pure: but to the denied and unbelieving, nothing is pure; but their mind and their conscience are denied.

Treasury of Scripture Knowledge

Summary

Every bed, whereon he lieth that hath the issue, is unclean: and every thing, whereon he sitteth, shall be unclean.

Bible References

Be unclean

1 Corinthians 15:33
Be not deceived: Evil communications corrupt good manners.
Ephesians 5:11
and do not participate in the unfruitful works of darkness, but rather even reprove them;
Titus 1:15
To the pure, all things are pure: but to the denied and unbelieving, nothing is pure; but their mind and their conscience are denied.