Leviticus

Contains rules and instructions for rituals, offerings, and how to live a holy life. ... click to read full summary of this book.

Then the priest shall come and look, and, behold, if the plague be spread in the house, it is a fretting leprosy in the house: it is unclean.

Then the priest will check and see, if the sickness has spread in the house. If it's a skin disease, the house is unclean.

* Work in progress - there may be occasional inaccuracies