Cross reference
Leviticus 15:4
4 Every bed whereon he that hath the issue lieth shall be unclean; and everything whereon he sitteth shall be unclean.
1 Corinthians 15:33
33 Be not deceived: Evil companionships corrupt good morals.
Ephesians 5:11
11 and have no fellowship with the unfruitful works of darkness, but rather even reprove them;
Titus 1:15
15 To the pure all things are pure: but to them that are defiled and unbelieving nothing is pure; but both their mind and their conscience are defiled.