Cabalistic author: flourished in Prague in the sixteenth and seventeenth centuries. His father, named Akiba according to Steinschneider and Benjacob, not Jacob, was the son of Abraham Sheftels and the brother of Isaiah Horowitz. He wrote "Nishmat Shabbethai ha-Lewi," a cabalistic treatise on the nature of the soul (Prague, 1616), and "Shefa Ṭal" (Prague, 1612; Frankfort-on-the-Main, 1719), another cabalistic compendium, containing also some works of others. The latter has been often reprinted, and is highly recommended by his cousin, Shabbethai the Younger, in his will.