'Dew' in the Bible

“Let my teaching drop as the rain,My speech distill as the dew,As the light rain upon the tender grass,And as the spring showers upon the herb.

And of Joseph he said,“Blessed by the Lord be his land,With the precious things of heaven, with the dew,And from the deep water that lies beneath,

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