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 even reprove them.

Titus 1:15

To the pure all things are pure; but to the defiled and unbelieving nothing is pure, but both their mind 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 even reprove them.
Titus 1:15
To the pure all things are pure; but to the defiled and unbelieving nothing is pure, but both their mind and conscience are defiled.