That cave is in the field of Machpelah near Mamre in the land of Canaan. Abraham bought that field from Ephron so that he could have a burying place.
Abraham bought the field and the cave in it from the Hittites. So this became his property to be used as a burial place.
Then he left his dead wife and went to talk to the Hittites. He said,
“I am only a foreigner staying in your country. I have no place to bury my wife. Please give me some land so that I can bury her.”
His sons Isaac and Ishmael buried him in the cave of Machpelah. This cave is in the field of Ephron, the son of Zohar. It was east of Mamre.