In the Old Testament dew is used as a symbol . Deuteronomy 32:3 says : '' ... my speech shall ditill as the dew , as the small rain upon the tender herb , and as the showers upon the grass . '' In the Biblical Old Testament dew is used symbolically in Deuteronomy 32:3 : `` My doctrine shall drop as the rain , my speech shall distill as the dew , as the small rain upon the tender herb , and as the showers upon the grass . ''