5 And the Lord spake unto Moses, Say unto Aaron, Stretch forth thine hand with thy rod over the streams, over the rivers, and over the ponds, and cause frogs to come up upon the land of Egypt.

6 And Aaron stretched out his hand over the waters of Egypt; and the frogs came up, and covered the land of Egypt.

7 And the magicians did so with their enchantments, and brought up frogs upon the land of Egypt.

God instructs Moses what miracle to perform, Moses and Aaron tell Pharaoh what it will be, and then it happens. The works of God typically follow this three-step process. He tells His servant, His servant tells the world at large, and then the fulfillment of the prophecy occurs. This establishes two principles that are largely consistent in God’s interactions with man.

1) God will speak to us indirectly, through His chosen prophet.
2) God will alert us to what He will do before He does it.

Thus we do not have to guess at what God will do next. It is knowable, though we do have to recognize who it is that speaks with his authority.

Presumably, the Egyptian magicians doing their enchantments to also bring up frogs was another attempt dispute who truly had that authority. Repeating the wonders of the staffs-to-snakes, water-to-blood, and summoning of frogs were likely meant as an argument that the Hebrew God was no more powerful than the Egyptian ones. It was to reassure Pharaoh so that he wouldn’t feel that he needed to give any regard to the words of Aaron and Moses.

This might have worked in the previous two instances, but as we will see in tomorrow’s verses, this wouldn’t be good enough for Pharaoh any longer. Whether by forces of darkness or subterfuge, the magicians were able to do some things, but they weren’t able to do the one thing Pharaoh actually needed. Only God could.