'To rain' signifies influx. In Genesis 2:5-6, Exodus 34:25-27, and Hosea 6:3, 'rain' signifies the tranquility of peace when the combat of temptation ceases. 'An inundating rain' signifies the vastation of truth, as in Ezekiel 3:11-14. 38:23, and temptation, as in Matthew 7:24-27. In Genesis 7:4, 'rain' signifies temptation and vastation. 'Rain,' in a positive sense, denotes blessing, but in the opposite sense, damnation

(Reference: Arcana Coelestia 2443; Leviticus 25)