“And the LORD spake unto Moses and unto Aaron, saying, ‘When Pharaoh shall speak unto you, saying, Shew a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent.’ And Moses and Aaron went in unto Pharaoh, and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent. Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments. For they cast down every man his rod, and they became serpents: but Aaron’s rod swallowed up their rods.
And He hardened Pharaoh’s heart, that he hearkened not unto them; as the LORD had said.” Exodus 7:9-13 (KJB)
The rod is the same one that Moses brought with him from Horeb, and he had turned it over to Aaron because of the events in chapter four where GOD gave Aaron to Moses as the one who would speak for him. It is the instrument of authority and power of GOD.
Aaron threw down the rod, and it became a serpent. The magicians of Egypt threw down their rods, they too became serpents but theirs was eaten by the rod of Aaron.
Some years ago I read an article in the magazine Biblical Archaeology Review of a serpent in the area of Egypt which could be handled by snake charmers, and holding them a certain way near the back of their head put them into a state of paralysis, and upon releasing them by tossing them to the ground would come back from that state. In their stiffened state they appeared as a rod of sorts. Now I do not know about that, but there would be no surprise in the artistry of the magicians of Egypt to do such.
The rod however, which had been with Moses when he heard GOD speaking from the burning bush was not such a rod. Moses was frightened when he first threw down the rod as GOD had said (Exodus 4:2-4). We would probably wonder; “What became of those eaten serpents?” They are gone.
Now, the question I might ask is; “What does this have to do with me?” and “What does this have to do with me as a Christian?”
The “Rod” of the Christian is the word of God. It is the authority of what we speak. It is the authority of God Himself. What He says will surely come to pass; not one word will fail.
One day the One who is given all power to rule will rule with a rod of iron (Psalm 2:9; Revelation 2:27; 12:5). His name is Jesus. He is the Son of God, God the Son.