Parashas Shemos · Passuk 4:26
Chabad.org — English translation + Rashi
Torah Temimah points to Nedarim 32a (verified).
Sefaria — Exodus 4:26
Sefaria — Nedarim 32a
E-Daf — Nedarim 32a
English: “Rabbi Yehuda bar Bizna taught: When Moses our teacher delayed the circumcision, the destructive forces called Anger and Wrath came and swallowed him, leaving only his feet. Immediately Tzipporah circumcised her son, and immediately “He let him alone.””
On the daf / in context: See the cited source for the full section.
Talmudic aggadic explanation of the release from danger
The immediate release after the circumcision shows the decisive role Chazal assign to performing the neglected mitzvah of circumcision.