Kabbalah su Genesi 37:32

Rabbi Yehuda said that for this trembling that Jacob brought upon Isaac his father, Jacob was punished by Joseph, and he trembled when they said to him "This we have found" (Beresheet 37:32). Isaac said "Who then (Heb. אֵיפֹה)." And by "אֵיפֹה," Jacob was punished. And although the Holy One, blessed be He, approved all the blessings, nevertheless he was punished by "eifoh" as it is written, "Where (אֵיפֹה) they feed their flock" (Beresheet 37:6), where Joseph was lost to him, and he was thereby punished. "...and Isaac trembled very much (lit. 'trembled very great trembling')." What is the meaning of the word "great" as used in the scripture? It is written "great" here and elsewhere, as in "and this great fire" (Devarim 18:16). (Meaning) that Gehenom entered with him. What does "very" mean? It is written "very" here and elsewhere, as in "and, behold, it was very good" (Beresheet 1:31), referring to the Angel of Death. He then said "Who then..." (Beresheet 27:33), when he understood that the blessings belonged to Jacob and not Esau.