Leviticus 14:38-40

New Revised Standard Version, Anglicised Catholic Edition

³⁸ the priest shall go outside to the door of the house and shut up the house for seven days. ³⁹ The priest shall come again on the seventh day and make an inspection; if the disease has spread in the walls of the house, ⁴⁰ the priest shall command that the stones in which the disease appears be taken out and thrown into an unclean place outside the city.