זוהר שמות — דף קכט ע”א

Folio 129a treats the secret of “Sim Shalom” (“Grant Peace”) in prayer and the service of the river that flows from the Garden of Eden. When one reaches “Sim Shalom,” the river acts in this threshing floor. Then all must leave from before the King and no one should be found there. One must fall prostrate in face-down prayer. Why? Because that moment is a moment of union, and every person must be ashamed before his Master, cover his face with great shame, and include his soul in that light destined to shine at the moment of Union.