Rabbi Mordechai Cohen was a late-16th-century kabbalist from Safed, who later was forced to leave Safed and served as a rabbi in Aleppo. He is known as “the Shach on the Torah,” after the acronym of his Torah commentary, Siftei Kohen. The commentary was printed several times and quoted often in certain later works, like those of Rabbi Hayyim Joseph David Azulai (known as the Chida).