Genesis 23:20

And the field, and the cave that is therein, were made sure unto Abraham for a possession of a buryingplace by the sons of Heth.

The field, and the cave that is therein, were made sure to Abraham for a possession of a burying place by the children of Heth.

And the field, and the cave that is therein, were made sure unto Abraham for a possession of a burying-place by the children of Heth.

and established are the field, and the cave which `is' in it, to Abraham for a possession of a burying-place, from the sons of Heth.

So the field and its cave were deeded by the Hittites to Abraham as a burial site.