Exodus 7:19-22

19Then the Lord said to Moses, “Say to Aaron, ‘Take your staff and 1stretch out your hand over the waters of Egypt, over their rivers, over their 2streams, and over their pools, and over all their reservoirs of water, that they may become blood; and there will be blood throughout all the land of Egypt, both in vessels of wood and in vessels of stone.’”

20So Moses and Aaron did even as the Lord had commanded. And he lifted up 34the staff and struck the water that was in the Nile, in the sight of Pharaoh and in the sight of his servants, and 5all the water that was in the Nile was turned to blood. 21The fish that were in the Nile died, and the Nile 6became foul, so that the Egyptians could not drink water from the Nile. And the blood was through all the land of Egypt. 227But the 8magicians of Egypt did 9the same with their secret arts; and Pharaoh’s heart was 10hardened, and he did not listen to them, as the Lord had said.