Sefer Bet Ulpana: Helek Sheni, Ha-Nikra. Zekhor Le-Avraham, ... / Beth Ulfana. Volume I: Zechor L'Abraham. This book comprises a collection of short sayings and scriptural interpretations of our great chassidic predecessors (parts of which were never before published), interpolated and applied to the liturgical prayers and poems, used during S'lichoth, Rosh-Hashano, Yom-Kippur and Sukkoth, many of these developed into complete sermons.