Another Jewish tradition tells that when Jacob was brought to be buried in the cave, Esau prevented the burial, claiming that he had the right to be buried in the cave; after some negotiation Naphtali was sent to Egypt to retrieve the document stating Esau sold his part in the cave to Jacob. As this was going on, Hushim, the son of Dan, and who was hard of hearing, did not understand what was transpiring, and why his grandfather was not being buried, so he asked for an explanation; after being given one he became angry and said: "Is my grandfather to lie there in contempt until Naphtali returns from the land of Egypt?" He then took a club and killed Esau, and Esau's head rolled into the cave. This implies that the head of Esau is also buried in the cave. Some Jewish sources record the selling of Esau's right to be buried in the cave—according to a commentary on the "Book of Exodus", Jacob gave all his possessions to acquire a tomb in the Cave of the Patriarchs. He put a large pile of gold and silver before Esau and asked, "My brother, do you prefer your portion of this cave, or all this gold and silver?" Esau's selling to Jacob his right to be buried in the Cave of the Patriarchs is also recorded in "Sefer HaYashar".