Leviticus 14:32-36

These are the instructions for purification for those who have recovered from a serious skin disease but who cannot afford to bring the offerings normally required for the ceremony of purification.” Then the LORD said to Moses and Aaron, “When you arrive in Canaan, the land I am giving you as your own possession, I may contaminate some of the houses in your land with mildew. The owner of such a house must then go to the priest and say, ‘It appears that my house has some kind of mildew.’ Before the priest goes in to inspect the house, he must have the house emptied so nothing inside will be pronounced ceremonially unclean.