Musar su Genesi 32:10

Afterwards (32, 10) Jacob prayed to the "G–d of my father Abraham and the G–d of my father Isaac who has said to me: 'return to your country and birthplace, etc.'" Rashi mentions that G–d had given Jacob two assurances, one at the time he had left his father's home at Beer Sheva, and the second when He told Jacob to return home and that He would be with him. On the latter occasion, G–d appeared to him using only the four-lettered ineffable name י-ה-ו-ה. The first assurance was clearly meant to reassure Jacob concerning his dealings with Laban and Esau, whereas the latter was to fortify Jacob against the fear of Samael. The very use of this name by G–d meant that Jacob had access to a dimension of G–d not available to the Gentile nations whose fate is guided by the attribute אל-הים, meaning agents or deputies of G–d such as the שרים. Jacob pointedly referred to both these assurances in his prayer.