BAHYA IBN PAQUDA - YIDDISH Bahya b. Joseph ibn Paquda, Sefer hovot ha-levavot ( ספר חובות הלבבות Duties of the Hearts) [treatise on medieval ethical philosophy, with a Yiddish translation by Samuel de Posen]. Amsterdam, Joseph, Jacob and Abraham, sons of Salomon Proops, 1768, [2], 147, 119 ff, Title in simple typographical border. 2 parts in one, in-8, 153 x 96 mm, contemporary binding, full vellum, soiling, foxing (Vinograd, Amsterdam 1950 [no copy at JNUL]; Zedner 73; Roest 132). Extremely rare first Yiddish edition of this famous treatise on avant-garde medieval ethical philosophy, which emphasizes the pre-eminence of the duties of the heart over the duties of the body.