Exodus 7:15
King James Version
“Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river’s brink against he come; and the rod which was turned to a serpent shalt thou take in thine hand.”
Context
12For they cast down every man his rod, and they became serpents: but Aaron’s rod swallowed up their rods.
13And he hardened Pharaoh’s heart, that he hearkened not unto them; as the LORD had said.
14And the LORD said unto Moses, Pharaoh’s heart hardened, he refuseth to let the people go.
15Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river’s brink against he come; and the rod which was turned to a serpent shalt thou take in thine hand.
16And thou shalt say unto him, The LORD God of the Hebrews hath sent me unto thee, saying, Let my people go, that they may serve me in the wilderness: and, behold, hitherto thou wouldest not hear.
17Thus saith the LORD, In this thou shalt know that I the LORD: behold, I will smite with the rod that in mine hand upon the waters which in the river, and they shall be turned to blood.
18And the fish that in the river shall die, and the river shall stink; and the Egyptians shall lothe to drink of the water of the river.