The cave is in the field of Machpelah near Mamre, in the land of Canaan. This is the field Abraham purchased from Ephron the Hittite as a burial site.
Jewish Publication Society of America Version (JPS1917) - Genesis 49:30 >in the cave that is in the field of Machpelah, which is before Mamre, in the land of Canaan, which Abraham bought with the field from Ephron the Hittite for a possession of a burying-place.