Read Genesis 23:17 Using Other Translations
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
So the field of Ephron in Machpelah, which was to the east of Mamre, the field with the cave that was in it and all the trees that were in the field, throughout its whole area, was made over
So Abraham bought the plot of land belonging to Ephron at Machpelah, near Mamre. This included the field itself, the cave that was in it, and all the surrounding trees.