The Mekhilta of Rabbi Shimon ben Yochai (Jewish Babylonian Aramaic: מכילתא דרבי שמעון בן יוחאי, romanized: Mǝkhilta dǝ-Rabbi Shimʿon ben Yoḥai) is midrash halakha on the Book of Exodus from the school of Rabbi Akiva attributed to Shimon bar Yochai. No midrash of this name is mentioned in Talmudic literature, but Nachmanides (d.1270) refers to one which he calls either Mekhilta de-Rabbi Shimon ben Yochai,[1]Mekhilta Achǝrita de-Rabbi Shimon,[2] or simply Mekhilta Acheret.[3]Todros ben Joseph Abulafia (d.1285) also refers to Mekhilta de-Rabbi Shimon ben Yochai.[4]