Joseph's brothers had carried their father's coffin up from Egypt to bury him in the Cave of Machpelah. At the mouth of the cave, Esau was waiting.
"This grave is mine," Esau said. "Jacob already used his share when he buried Leah." The sons of Jacob argued back: their father had explicitly told them (Genesis 50:5), In my grave which I have digged for me in the land of Canaan, there shalt thou bury me.
"Where is the deed?" Esau demanded.
"In Egypt," they answered. And before another word could be said, Naphtali was running. The Book of Jasher says he was so light-footed he could run over ears of standing corn without crushing them. He flew back toward Egypt to retrieve the title.
Meanwhile, at the cave, Hushim the son of Dan was standing near the coffin. Hushim was deaf. He saw the crowd, saw the commotion, saw Esau gesturing, saw his grandfather's body sitting unburied in the sun — and he did not understand. He asked what was going on. Someone told him.
Hushim did not wait for the deed. He picked up a club and brought it down on Esau's head so hard that Esau's eyes dropped from their sockets and fell at Jacob's feet. And it is told (Sotah 13a) that as those eyes rolled against the coffin, Jacob himself opened his own eyes inside the coffin and smiled grimly. This is what Psalms meant (Psalms 58:10): The righteous shall rejoice when he seeth the vengeance; he shall wash his feet in the blood of the wicked.
And so Rebekah's prophecy was fulfilled (Genesis 27:45): Why should I be deprived also of you both in one day? Jacob and Esau did not die on the same day, but they were buried on it.