Psalms 121:6:
יוֹמָ֗ם הַשֶּׁ֥מֶשׁ לֹֽא־יַכֶּ֗כָּה וְיָרֵ֥חַ בַּלָּֽיְלָה׃
The sun shall not smite you by day, nor the moon by night.
I understand that the sun "smiting" you can cause sunburn and heat stroke. But what harm can the moon cause?
Metzudat David commentary says the moisture of the moon can cause sicknesses (kudos to DoubleAA for explaining). WjatWhat does this mean? AFAIK, the moon has no moisture. DODo they mean dew at night? That doesn't come from the moon, and dew is not damaging from what I know.