Pseudonym of a kabbalist belonging, according to Jellinek, to the school of Isaac the Blind. The works which bear this name are Sefer Ha-Yiḥud and Sefer Ha-Iyyun.

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כותרת
Sefer Ha-Iyyun : הרשמו להמשך קריאה...
Sefer Ha-Yichud : הרשמו להמשך קריאה...