And he said, Cast it on the ground. And he cast it on the ground, and it became a serpent; and Moses fled from before it. (4:3)

And the Lord said unto Moses, Put forth thine hand, and take it by the tail. And he put forth his hand, and caught it, and it became a rod in his hand: (4:4)

And Aaron spake all the words which the Lord had spoken unto Moses, and did the signs in the sight of the people. (4:30)

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. (7:10)

For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods. (7:12)