Jacob ben Reuben (Karaite)

Jacob ben Reuben was a prominent Karaite scholar and Bible exegete of the eleventh century, notable for his contributions to the field of Judaism. His most significant work is the Sefer ha-'Osher, a comprehensive Hebrew language commentary on the entire Bible. This commentary was designed to provide readers with sufficient information, rendering extensive recourse to other voluminous commentaries unnecessary.

The Sefer ha-'Osher is a compilation of explanations and commentaries from various sources, including the work of Yefet ben Ali, from whom Jacob borrowed extensively. Additionally, Jacob drew upon the works of later Karaite authors, such as Jeshua ben Judah, who flourished around 1054. The date of Jeshua ben Judah's activity suggests that the Sefer ha-'Osher was composed in the second half of the eleventh century, making it a significant work of its time. Through his commentary, Jacob ben Reuben provided a concise and accessible resource for understanding the Bible, reflecting his role as a key figure in Karaite scholarship.