Parashas Metzora · Passuk 15:08
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “On the pure person” — one might think even without contact; Scripture teaches “on the pure person” — only until he touches the pure person.
Contact required
Chazal require actual contact of the spit with the pure person; mere proximity is insufficient.