TT #200 · Parshas Shemini · Aliyah 7 · Passuk 34
Chabad.org — Vayikra Chapter 11 with Rashi
English: “Upon which water comes”: food that comes into contact with water is prepared to contract impurity; food that does not come into contact with water is not prepared in this way.
Chullin 36a.
E-Daf.com — Chullin 36a (Tsurras Hadaf)
Halachic condition — The Chazal derives the stated rule directly from the wording of the verse.
Qualifying water prepares food to receive impurity.