The publication Tzava'at Ha-RIBaSH: Testament of the Founder of Hasidism, Rabbi Israel Ba'al Shem Tov deals with one of the earliest Hasidic books, Tzava'at Ha-RIBaSH ve-hanhagot yesharot. Its main goal is to introduce this work to Czech readers and to present its translated text along with the commentary that helps to explain the meaning of Hasidic teaching.