TT #226 · Parshas Shemini · Aliyah 7 · Passuk 39
Chabad.org — Vayikra Chapter 11 with Rashi
English: “From the animal”: some animals are included in this impurity while some are not; the example is a tereifah that was slaughtered.
Zevachim 69b.
E-Daf.com — Zevachim 69b (Tsurras Hadaf)
Textual distinction — The Chazal derives the stated rule from the wording and comparison in the verse.
A slaughtered tereifah is the stated partial exception.