Sefer haZohar on the Letters of the Forty-Two Letter Divine Name

"Here is a mystery for fathomers: One who wishes to set out on a journey should rise before dawn and gaze momentarily toward the east and he will see an apparition of letters striking the sky, one ascending, another descending. These are the sparkling of the letters with which heaven and earth were created.

"If, by the mystery of those letters, he knows the mystery of the Holy Name of Forty-Two Letters and invokes them fittingly with fervor, he will see in the glow of the foredawn in the sky six yods, three to the right and three to the left, and three vavs ascending and descending, sparking the sky ─ these are the letters of the priestly blessing. Then he should recite his prayer and set out on his way; surely Shekhinah is with him, preceding. Happy is his share!"

-- Sefer haZohar 2:130b (transl. D. Matt)