'Drop' in the Bible

You will have olive trees throughout your territory but not anoint yourself with oil, because your olives will drop off.

My doctrine shall drop as the rain, my speech shall distil as the dew, as the small rain upon the tender herb, and as the showers upon the grass:

Israel then shall dwell in safety alone: the fountain of Jacob shall be upon a land of corn and wine; also his heavens shall drop down dew.