some reflection towards the lies for Jacob, as mother Rebecca, in old testimony, when the issac was blind , with her push for sons marriage with non Canaan girls (idolatry )
When the time came for Rebecca to give birth, the first child to come out emerged red and hairy all over, with his heel grasped by the hand of the second to come out. Onlookers named the first עשו, Esau ('Esav or 'Esaw, meaning either "rough", "sensibly felt", "handled", from Hebrew: עשה, asah, "do" or "make"; or "completely developed", from Hebrew: עשוי, assui, since Esau had as much hair as a child who was much older)[15] The second was named יעקב, Jacob (Ya'aqob or Ya'aqov, meaning "heel-catcher", "supplanter", "leg-puller", "he who follows upon the heels of one", from Hebrew: עקב, aqab or aqav, "seize by the heel", "circumvent", "restrain", a wordplay upon Hebrew: עקבה, iqqebah or iqqbah, "heel"). The Bible states that Isaac was sixty years old when the twins were born.
personally this preference might yields transfer of the consciousness of the concern 'ו'into'ב' , while 'ש' into 'ק' ( עשו, Esau; יעקב, Jacob)