שיר השירים ב:ט קבלה: Tikkunei Zohar

When the groom, that is, the sun, comes to light up the moon, she decorates her hair with thirteen decorations - twelve constellations and the moon. And He (Psalms 19:6) "is like a groom coming forth from his chamber; like a hero, eager (yasis) to run," - to run his courses in the heavens. He surely peeks (yatsits) at her, as it says (Song of Songs 2:9) "Peeking through the lattice." - looking at her in the heavens.