TT #209 · Parshas Shemini · Aliyah 7 · Passuk 35
Chabad.org — Vayikra Chapter 11 with Rashi
English: “They shall be impure for you”: the phrase includes both a prohibition of eating and a prohibition of benefit; an item whose use is prohibited by Torah law may not be used for commerce.
Yerushalmi Sheviit 7:1.
Sefaria — Jerusalem Talmud Sheviit 7:1
Halachic application — The Chazal derives the stated rule from the wording and structure of the verse.
The verse supports eating and benefit prohibitions and the commercial rule.