ויקרא, פרק י״ד, פסוק מ׳

When a plague spreads within the walls of a home, the process of purification shifts from observation to drastic physical action. The infected sections of the structure must be completely uprooted and removed from the community. Although the priest is the authority who issues the command, the actual physical labor of extracting the stones can be performed by anyone [תורה תמימה, מלבי״ם, אדרת אליהו]. While the basic idea of extraction might seem as simple as slipping off a shoe [רש״י, ביאור יש״ר, אבן עזרא], removing stones from a solid wall requires deliberate effort and the use of tools. This dismantling is possible because the stones of the house are not entirely sealed together [ביאור יש״ר, פירושי רד״צ הופמן, ביאור שטיינזלץ]. At this stage of the quarantine, only the plagued parts are taken out rather than destroying the entire house, much like the process for an infected garment where only the afflicted area is initially removed [רלב״ג, מלבי״ם]. Furthermore, this law applies specifically to actual stones, requiring the removal of at least two, and does not apply to other building materials such as bricks [תורה תמימה, מלבי״ם, רלב״ג, אדרת אליהו].

The responsibility for this dismantling depends on the layout of the home. If the infected wall is shared between two adjoining houses, the duty to remove the stones falls on both neighbors equally. This shared burden reflects the ancient wisdom that living next to a wrongdoer brings trouble to the neighbor as well. Conversely, if the plagued wall faces the open air and is not shared, the homeowner alone bears the responsibility for the removal [תורה תמימה, מלבי״ם, חזקוני, רש״ר הירש, ברכת אשר].

Once the stones are removed, they must be discarded outside the city limits. There is a fundamental difference between the banishment of an infected person and the disposal of infected stones. While a person with this plague is only sent outside of walled cities, the stones must be cast out of any town entirely, even those without surrounding walls [תורה תמימה, הכתב והקבלה, מלבי״ם, רש״ר הירש, פירושי רד״צ הופמן]. They are thrown into a designated unclean area, such as a dumping ground or a cemetery, where people who maintain ritual purity do not go [רש״י, בכור שור, ביאור שטיינזלץ]. Discarding them in such a rejected location ensures that their impure status is obvious and prevents anyone from taking the stones to reuse them [אבן עזרא].

The exact nature of the impurity in this disposal area is a matter of careful detail. Since natural ground cannot technically contract ritual impurity, the earth itself does not become inherently defiled. Instead, the stones themselves project impurity into their environment as long as they remain there, defiling the air above them and anything that touches, carries, or passes over them [לבוש האורה, גור אריה, רש״ר הירש, פירושי רד״צ הופמן, ברכת אשר]. Some commentators, however, note that the disposal site is specifically marked, and even if the stones are eventually moved, the top layer of dirt they rested upon absorbs the impurity and remains defiled [צפנת פענח, מלבי״ם].