Parashas Mishpatim · Passuk 23:19
Chabad.org — English translation + Rashi
Torah Temimah points to Chullin 114a (verified).
Sefaria — Exodus 23:19
Sefaria — Sanhedrin 4b
E-Daf — Sanhedrin 4b
English: From where do we know that the animal itself may not be cooked in its own milk? The verse says, “in its mother’s milk.”
On the daf / in context: See the cited source for the full section.
Derash on the verse.