ויצוו אל יוסף. ובחיי אביהם למה לא צוו אלא אמרו מה לנו לעורר השנאה שהרי כבר שכחה והלכה לה כיון שחזרו מלקבור אביהם ועבר יוסף על הבור שהשליכוהו אחיו אמר ברוך שעשה לי נס במקום הזה אמרו עדיין יש שנאה טמונה בלבו מיד ויצוו אל יוסף: ויצוו אל יוסף , “they sent a messenger to deliver an urgent message to Joseph;” why did they not do so during the lifetime of their father? During the lifetime of their father they had thought it best not to resurrect old hatreds, etc. they assumed that the past had been buried. When they had passed the pit into which they had thrown Joseph they observed how Joseph recited the blessing appropriate for people who had been the witness and beneficiaries of Divine miracles. When they saw this, they were afraid that he had not forgiven them for the past.