זוהר שמות — דף רסב ע”א

In the second lower palace the souls are deposited to ascend in the dream vision. One bows and gives thanks for the souls. The recitation of the Shema Israel is the bond of the supernal Yihoud with heart feeling and love. In the third lower palace, spirits stand guard at the palace gates. The Yihoud of death and the Yihoud of the left in the Shema recitation are accomplished by exhaling the supernal breath.