What does Exodus 8:13 mean?
This verse indicates that God did precisely as Moses said He would. This does not mean that the Lord followed Moses' commands. It demonstrates that Moses' earlier words were truly a message from God (Exodus 3:10; 5:1–3; 7:2). Pharaoh summoned Moses and Aaron to ask for relief from a plague of frogs (Exodus 8:8). Moses agreed to a timeline, so Pharaoh would know that it was the Lord who controlled the situation (Exodus 8:9–11).As expected, the invasion of frogs which infested every aspect of Egyptian life (Exodus 8:3–4) was stopped. Most likely, Pharaoh was not expecting this exact mechanism. The plague has already demeaned the Egyptian goddess associated with frogs, Heqet, by proving that only the God of Israel has power. Now, the symbols of her power drop dead, all at once. The corruption of the Nile created a revolting stench (Exodus 7:20–21). The second plague, as well, makes a disgusting mess of Egypt (Exodus 8:14).