Parashas Acharei Mos · Passuk 17:15
Chabad.org — English translation + Rashi
Torah Temima points to Toras Kohanim.
English: “And is tamei until evening” — teaches that the food does not render garments tamei while inside the intestines.
No tumah from intestinal contents
Once swallowed past the throat, the neveilah no longer conveys garment impurity from within the body.