Leviticus 14:36
“Then the priest shall command that they empty the house, before the priest go into it to see the plague, that all that is in the house be not made unclean: and afterward the priest shall go in to see the house:”
When ye be come into the land of Canaan, which I give to you for a possession, and I put the plague of leprosy in a house of the land of your possession;
And he that owneth the house shall come and tell the priest, saying, It seemeth to me there is as it were a plague in the house:
Then the priest shall command that they empty the house, before the priest go into it to see the plague, that all that is in the house be not made unclean: and afterward the priest shall go in to see the house:
And he shall look on the plague, and, behold, if the plague be in the walls of the house with hollow strakes, greenish or reddish, which in sight are lower than the wall;
Then the priest shall go out of the house to the door of the house, and shut up the house seven days:
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“Looking diligently lest any man fail of the grace of God; lest any root of bitterness springing up trouble you, and thereby many be defiled;”
“Be not deceived: evil communications corrupt good manners.”
“And I heard another voice from heaven, saying, Come out of her, my people, that ye be not partakers of her sins, and that ye receive not of her plagues.”
“And their word will eat as doth a canker: of whom is Hymeneus and Philetus;”
“And every open vessel, which hath no covering bound upon it, is unclean.”