זוהר שמות — דף ריה ע”ב

The supernal point, the Yod, expands and produces a spirit that creates a palace extending in six directions, fulfilling the secret of the holy Name. This is how Joshua was filled with the spirit of wisdom when Moses laid his hands upon him. One who eats without first praying is like a diviner, for at night the soul ascends and the person remains with only the force of blood. Prayer settles the force of blood and strengthens the soul in its proper place.