Tanya for the 25th of Menachem Av, כ׳׳ה מנחם אב

At this point, the Alter Rebbe resumes the thought begun earlier, where it was pointed out that Jacob referred to G-d as “E-l, G-d of Israel,” for the soul of Jacob (otherwise known as Israel) was illumined with all the aspects of the Divine radiance, just as was the soul of Adam.