TT #252 · Parshas Shemini · Aliyah 7 · Passuk 43
Chabad.org — Vayikra Chapter 11 with Rashi
English: “And you shall become impure through them”: one who makes himself impure in this world is caused to become impure in the World to Come.
Yoma 39b.
E-Daf.com — Yoma 39b (Tsurras Hadaf)
Middah and consequence — The Chazal applies the verse’s wording and structure to establish the stated teaching.
The verse's language is extended to teach that self-defilement in this world carries consequence into the world to come.