Kabbalah su Genesi 25:12

Come and behold, it is written, "Now these are the generations of Ishmael" (Gen. 25:12), and they are twelve princes. Then it is written, "And these are the generations of Isaac" (Ibid. 19). Is it possible that because it is written that Ishmael sired twelve princes and Isaac sired two, he (Ishmael) is more righteous? It is therefore written, "Who can utter the mighty (Heb. גְּבוּרוֹת) acts of Hashem." This refers to Isaac for Isaac sired Jacob, who alone is more important than all of them, for he fathered the twelve tribes, and sustained the upper and the lower, while Isaac supported the higher in supernal holiness and Ishmael only below. Therefore the verse, "Who can utter the mighty acts of Hashem," refers to Isaac, as explained above. The words, "declare all His praises," refers to Jacob. When the sun connects with the moon, many stars shine from them.