“It was when Isaac concluded to bless Jacob, and Jacob had just departed from the presence of Isaac his father, and Esau his brother came from his hunt” (Genesis 27:30). “It was when Isaac concluded to bless Jacob” – Rabbi Aivu said: The tent of our patriarch Isaac was open on all sides. One came from here and one came from there. The Rabbis say: It was hinged, and the doors would fold backward. Jacob stood behind the door until Esau entered, and then he went out. That is what is written: “Jacob had just departed [Akh yatzo yatza]” – he appeared to go out but was not going out. “And Esau his brother came from his hunt [mitzeido]” – he was armed to hunt for his life, just as it says: “But if one did not have intent [tzada]” (Exodus 21:13).5The verse appears in the context of murder.
Jacob — Isaac's Transgression
Bereshit Rabbah 66:5