Genesis 23:17-20

17So the field of Ephron, which was at Machpelah, which was before Mamre, the field, and the cave that was in it, and all the trees that were in the field, that were in all its borders round about, 18were assured to Abraham for a possession before the eyes of the sons of Heth, before all who went in at the gate of his city. 19And after this, Abraham buried Sarah his wife in the cave of the field at Machpelah, opposite to Mamre: that is Hebron, in the land of Canaan. 20And the field and the cave that was in it were assured to Abraham for a possession of a sepulchre by the sons of Heth.