Now Esav harbored a grudge against Yaakov because of the blessing that his father had given him, and Esav said to himself, “Let the days of mourning for my father draw near, then I will kill my brother Yaakov.”
English: Saturnalia is a festival day of the idolaters… [the name is from] hidden hatred — a hater who takes vengeance and bears a grudge, as it is written “And Esav harbored a grudge against Yaakov.”
On the daf / in context: The rare verb va-yistom is linked etymologically to the Roman festival name and to the lasting character of Esav’s enmity.
Type of Learning
Custom (aggadah — lasting grudge of Esav)
What Is Learned
The word va-yistom points to a deep, stored hatred; it is associated with the character of Esav’s enduring enmity and with the name of a Roman festival.