Yahweh keeps them safe (Ps 121:5-121:6)

“Yahweh is your keeper.

Yahweh is your shade

At your right hand.

The sun shall not strike you by day.

The moon shall not strike you by night.”

Yahweh keeps them safe. He is their shade, protecting them during the day from the sun and at night from the moon.  Watch out for too much moon shine!