What does Exodus 9:19 mean?
Of the ten plagues (Exodus 3:20), this one is unique since it comes with the opportunity to reduce losses. The Lord has threatened Egypt with a historic hailstorm (Exodus 9:18). Here, Moses—through Aaron (Exodus 4:14–16)—delivers a message that those who bring their servants and animals indoors will be safe from the lethal weather.Some of Pharaoh's servants have begun to acknowledge the power of Israel's God. Court magicians credited the plagues with divine power (Exodus 8:19). In response to this new prediction, some Egyptians will take precautions (Exodus 9:20–21). Those who ignore the advice will lose everything left unprotected (Exodus 9:25). Unfortunately, crops nearing harvest cannot be moved inside, so they will be lost (Exodus 9:31).
A crucial detail is that this vicious storm will not affect the Hebrews (Exodus 9:26). The supernatural judgments brought by God display His power (Exodus 6:7; 7:5; 9:14; 10:1–2). The disasters also counter Egyptian faith in various idols by demonstrating God's power over various spheres of nature. When the hail only strikes Egyptian land, and not the homes of Israelites (Exodus 9:26), it proves that the event is unnatural; weather gods like Set and Horus have no power.