The Kol Aryeh from R. Aryeh Leib the preacher of Polnoye is considered the first [published] Chassidic work. The book cites the teachings of the Besht.
(Marginal note: Otzar Hasefarim: 5558. Toldos Ya’akov Yosef 5740).
The preacher from Polnoye traveled around the world because the Besht ordered him to disseminate his teachings from the pulpit.
I.F.
Sanzer Rebbe
Rabbi Rotenberg
