1 Corinthians 15:33

Be not deceived. Evil communications corrupt good manners.

Ephesians 5:11

And have no fellowship with the unfruitful works of darkness, but rather reprove them.

Titus 1:15

To the clean all things are clean; but to the defiled and unbelieving nothing is clean; but both their understanding and conscience are defiled.

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 have no fellowship with the unfruitful works of darkness, but rather reprove them.
Titus 1:15
To the clean all things are clean; but to the defiled and unbelieving nothing is clean; but both their understanding and conscience are defiled.