Genesis 27:39
And Isaac his father answered and said unto him, Behold, thy dwelling shall be the fatness of the earth, and of the dew of heaven from above; And Isaac his father answered and said unto him, Behold, thy dwelling shall be the fatness of the earth, and of the dew of heaven from above;
The words were spoken by Isaac to Esau after the chief blessing had already been given to Jacob, who had taken his brother's place before their blind father by fraud. The temporal prosperity contained in that secondary blessing was not automatic but conditional, to be given by God only in proportion to Esau's course — blessing if he loved and reverenced God, withheld if he rejected God and His commandments. Likewise Jacob's reception of divine blessing did not depend on holding the outward rights of the firstborn, but could be secured by a righteous life.
The fraud brought its immediate penalty in that Jacob had to flee to save his life from Esau's threatening revenge. That early wrongdoing set the context for his later experience of repentance and earnest prayer and for God's preserving care over him. The same spirit of deceit reappears whenever there is partiality and hypocrisy, men treated as mere machinery, their liberty restricted, authority exercised as lordship over God's heritage, persons turned aside from their rights, and advantage grasped by crafty reasoning with no regard for agreements or for the disappointment and injury inflicted on others.