Parashas Metzora · Passuk 15:27
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “Anyone who touches them” — through their attachments [ropes, threads extending from the bed within the defined measures].
Attachments included
Chazal include contact with the bed’s defined attachments under the impurity of touching the midras itself (the inverse of the earlier exclusion in the zav section for certain rope lengths).