Parashas Mishpatim · Passuk 23:19
Chabad.org — English translation + Rashi
Torah Temimah points to Chullin 113b (verified).
Sefaria — Exodus 23:19Sefaria — Sanhedrin 4bE-Daf — Sanhedrin 4b
English: Rabbi Abahu said in Rabbi Yochanan’s name: Whoever joins the Name of Heaven with something else is uprooted from the world, as it says, “except to Hashem alone.”
On the daf / in context: See the cited source for the full section.
Derash on the verse.