Asher ben David was a Provençal Kabbalist born in Posquières, who flourished about the middle of the thirteenth century. He was the grandson of Abraham ben David of Posquières, and a pupil of his uncle Isaac the Blind. Asher ben David is one of the earliest kabbalistic writers. He was the author of Perush Shelosh Esreh Middot or (Commentary on the Thirteen Attributes of God), and his most important work, the Sefer ha-Yiḥud (The Book of Unity, an explanation of the Tetragrammaton and the sefirot)…