[The Kohen] returns at the end of the week to examine [the house]. If [the nega] returned, ‘‘The house is demolished — its stones, its wood, and all the clay of the house — and removed from the city to a tamei place.’’ An adjoining expansion [of] any size is tamei; a distant one must be the size of a gris. The return of a house nega must be two gris.

There are ten houses: [If the nega] turns dull after the first [week] or [it] disappears, it is scraped off and [the house] becomes tahor. [If the nega] turns dull after the second [week] or [it] disappears, it is scraped off, and the house requires taharas hatzipporim. [If the nega] spreads after the first [week], [the owner] removes, scrapes, and plasters, and [the Kohen] gives [the house] a week [of confinement]. [If the nega] returns, [the house] is demolished. [If the nega] does not return, [the house] requires taharas hatzipporim. [If the nega] remains the same after the first [week] and spreads after the second, [the owner] removes, scrapes, and plasters, and [the Kohen] gives [the house] a week [of confinement]. [If the nega] returns, [the house] is demolished. [If the nega] does not return, [the house] requires taharas hatzipporim. [If the nega] remains the same after both [weeks], [the owner] removes, scrapes, and plasters, and [the Kohen] gives [the house] a week [of confinement]. [If the nega] returns, [the house] is demolished. [If the nega] does not return, [the house] requires taharas hatzipporim. If the nega reappears before [the owner] made [the house] tahor with taharas hatzipporim, [the house] is demolished. If [the nega] reappears after [the owner] made [the house] tahor with taharas hatzipporim, [the house] is examined anew.