The Jewish communities of Speyer, Mainz, and Worms (known collectively as ShUM), the ancient center of Torah scholarship in Ashkenaz, produced many generations of scholars who wrote glorious chapters in the history of Jewish culture. Particularly prominent was the distinguished circle of sages active there at the turn of the twelfth and thirteenth centuries, including Rabbi Yehudah ben Kalonymos of Speyer, Rabbi Yehudah ben Kalonymos of Mainz, Rabbi Shmuel the Pious and his son Rabbi Yehudah the Pious, Rabbi Simcha of Speyers and Rabbi Eleazar of Worms. Even though the names of the sages of ShUM appear countless times throughout rabbinic literature, only a very small portion of their work in the fields of Talmud and halakhah has come down to us. For centuries, the only works available in print were Sefer ha-Rokeach by R. Eleazar of Worms and Sefer Raban. Even the great surge in the critical publication of texts from the nineteenth century onwards has only slightly increased that number. The present volume seeks to fill this gap to some extent. It presents the full text of Rabbi Eleazar of Worms’s Sermon for Passover , and the introduction describes two additional halakhic works by him that have been discovered in manuscript. The Sermon provides the earliest evidence for several well-known Ashkenazic customs—among them the dripping of sixteen drops of wine during the Passover Seder, the prohibition of eating legumes (kitniyot) on Passover, and the eating of dairy foods on Shavuot. A first edition of the Sermon was published twenty years ago; it is now republished with additions and corrections.