Side-ring EXTRA · Seven sprinklings on the house
Parallel to the seven sprinklings of the person-metzora rite (14:7), treated in Toras Kohanim / Sifra.
English: “And he shall sprinkle toward the house seven times” — corresponding to the seven sprinklings in the purification of a person.
Structural symmetry
The house is purified with the same sevenfold sprinkling pattern used for a person, binding the two domains of nega law.