Rabbi David lived in Seville, Spain (late 13th-14th century). This book which enjoyed much popularity, is his major work. It contains a clear insightful commentary on the prayers and blessings, a compendium customs, a discussion of the obligation of reciting the Shema; the laws of prayer; and the various categories of blessings. Much of the halachic materials of his work is quoted in halachic codes, especially in Beit Yosef.
Also included, his composition TASHLUM ABUDRAHAM, a running commentary on the Temple Avodah litrugy recited on Yom Kippur.(vowelized text)