Genesis 23:17-18

And the field of Ephron, which {was} in Machpelah, which {was} before Mamre, the field, and the cave which {was} therein, and all the trees that {were} in the field, that {were} in all the borders round about, were made sure Unto Abraham for a possession in the presence of the children of Heth, before all that went in at the gate of his city.