יט.וַיֹּאמֶר יַעֲקֹב אֶל אָבִיו אָנֹכִי עֵשָׂו בְּכֹרֶךָ עָשִׂיתִי כַּאֲשֶׁר דִּבַּרְתָּ אֵלָי קוּם נָא שְׁבָה וְאָכְלָה מִצֵּידִי בַּעֲבוּר תְּבָרֲכַנִּי נַפְשֶׁךָ

19. And Jacob said to his father, “I am Esau your firstborn. I have done as you have spoken to me. Please rise, sit down and eat of my game, so that your soul will bless me.” (Toldos 27:19)
When יעקב said “I am  עשוyour firstborn”, everyone learns the famous Rashi as a child that יעקב paused after he said “I am”, and then affirmed that עשו was his firstborn son.

But what about the rest of the פסוק – “I have done as you have spoken to me”?  Had יצחק really instructed him to do anything at all?

At this juncture, Rashi says that יעקב was referencing an earlier instruction that he had carried out.

The Od Yosef Chai explains that the אבות taught their sons the Torah, father to son, אברהם to יצחק, יצחק to יעקב, יעקב to the Shevatim. Certainly the instructions they received included the מצוה of כיבוד אב ואם which requires one to listen to instructions and do the will of parents.

We find in the פסוק that רבקה “instructed” יעקב to take the food to his father and thus receive the ברכות. Why did he do as his mother had instructed? Because his father had taught him to. This is the deeper meaning of the פסוק “I have done as you instructed” – to listen to my parents and do the מצוה of כיבוד אב ואם.

And that was certainly no lie!