創世記 27:2 註釋：Rashi, Rashbam, Radak & Sforno

לא ידעתי יום מותי I KNOW NOT THE DAY OF MY DEATH — R. Joshua the son of Korcha said: When a person approaches the age at which his parents died he may well be anxious five years before and five years after. Isaac was then one hundred and twenty three years old and he said, “Perhaps I shall only reach the age of my mother who died at the age of 127 and I am now within five years of her age: therefore, I know not the day of my death —I may only reach the age of my mother or it may be the age of my father” (Genesis Rabbah 65:12).

הנה נא, I beg of you, due to my old age and the fact that I want to bestow on you the blessing which is within my power to bestow, the blessing of Avraham concerning inheriting this land.

ויאמר...לא ידעתי יום מותי. Perhaps I will die suddenly so that I will not have a chance to bless you close before my death.