'Dew' in the Bible

“Let my teaching drop as the rain,My speech distill as the dew,As the droplets on the fresh grassAnd as the showers on the herb.

Of Joseph he said,“Blessed of the Lord be his land,With the choice things of heaven, with the dew,And from the deep lying beneath,

“So Israel dwells in security,The fountain of Jacob secluded,In a land of grain and new wine;His heavens also drop down dew.