זוהר שמות — דף קס ע”ב

Alef-Lamed generates the firmament and the supernal waters. In the Shema Yisrael, the enlarged Ayin contains seventy supernal names. Yisrael Saba is the supernal mirror that receives from the right. The Shema appears three times in the Torah, each occurrence pointing to a different secret within the mysteries of holiness.