Thus says the LORD, In this you shall know that I am the LORD: behold, I will strike with the rod that is in my hand upon the waters which are in the river, and they shall be turned to blood. And the fish that are in the river shall die, and the river shall stink; and the Egyptians shall loathe to drink of the water of the river. And the LORD spoke unto Moses, Say unto Aaron, Take your rod, and stretch out your hand upon the waters of Egypt, upon their streams, upon their rivers, and upon their ponds, and upon all their pools of water, that they may become blood; and that there may be blood throughout all the land of Egypt, both in vessels of wood, and in vessels of stone. read more.
And Moses and Aaron did so, as the LORD commanded; and he lifted up the rod, and smote the waters that were in the river, in the sight of Pharaoh, and in the sight of his servants; and all the waters that were in the river were turned to blood. And the fish that were in the river died; and the river stank, and the Egyptians could not drink of the water of the river; and there was blood throughout all the land of Egypt. And the magicians of Egypt did so with their enchantments: and Pharaoh's heart was hardened, neither did he hearken unto them; as the LORD had said. And Pharaoh turned and went into his house, neither did he lay to heart this also. And all the Egyptians dug round about the river for water to drink; for they could not drink of the water of the river. And seven days were fulfilled, after the LORD had smitten the river.

And had turned their rivers into blood; and their streams, that they could not drink. Verse ConceptsBlood, as symbol of guiltTurned To Blood

He turned their waters into blood, and slew their fish. Verse ConceptsBlood, as symbol of guiltTurned To BloodDeath Of Creatures