Baruch Ashlag
Baruch Shalom HaLevi Ashlag (Hebrew: ברוך שלום הלוי אשלג) (also known as the RABASH) (January 22, 1907 – September 13, 1991) was a kabbalist, the firstborn and successor of Yehuda Ashlag also known as Baal Hasulam, the author of "The Sulam" commentary on the Zohar. Among his writings: Shlavey ha Sulam ("Rungs [of] the Ladder"), Dargot ha Sulam ("Steps [of] the Ladder"), Igrot Rabash ("Letters [of the] Rabash").