As long as Avraham was alive, Esav did not rebel… That very day Avraham our father passed away.
On the daf / in context: The day Esav returned exhausted is identified as the day of Avraham’s death; Yaakov was preparing the lentil stew of mourning.
Type of Learning
Custom (Bavli — Esav’s first open rebellion on the day of Avraham’s death)
What Is Learned
Esav did not openly rebel while Avraham was alive; the day of the stew is the day Avraham died.