Parashas Masei · Passuk 35:21 · TT note 1
Chabad.org — English translation + Rashi
Torah Temimah points to Sanhedrin 76b (TT note on “אוֹ בְאֵיבָה”).
E-Daf — Sanhedrin 76b · Sefaria
English: “Or in enmity” — if he pressed him into water or into fire so that he could not escape and he died, he is liable; for the verse says “or in enmity” — to include one who confines [the victim].
Inclusion of confinement-to-death under intentional murder.
Forcing a person into fire or water from which he cannot escape is capital murder under the term “in enmity.”