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The Midrash is not a single book but a vast body of literature divided into two primary types: (PDF) Midrash and the Hebrew Bible - Academia.edu midrash pdf free download
Arranged by the weekly Torah portion, the Tanchuma is famous for its rhetorical openings ("Yelamdenu Rabbenu..."). This is a favorite for weekly sermon preparation. Avoid sketchy "file sharing" websites that inject malware