9 When Pharaoh shall speak unto you, saying, Show a miracle for proof: then you shall say unto Aaron, Take your rod, and cast it before Pharaoh, and it shall become a serpent.
10 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.
11 Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments.
12 For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods.
13 And he hardened Pharaoh's heart, that he hearkened not unto them; as the LORD had said.
14 And the LORD said unto Moses,
15 Get you unto Pharaoh in the morning; lo, he goes out unto the water; and you shall stand by the river's bank until he comes; and the rod which was turned to a serpent shall you take in your hand.