Cross reference
Leviticus 15:4
4 Every bed, whereon he lieth that hath the issue, is unclean: and every thing, whereon he sitteth, shall be unclean.
1 Corinthians 15:33
33 Be not deceived: evil communications corrupt good manners.
Ephesians 5:11
11 And have no fellowship with the unfruitful works of darkness, but rather reprove them.
Titus 1:15
15 Unto the pure all things are pure: but unto them that are defiled and unbelieving is nothing pure; but even their mind and conscience is defiled.