Exodus 7:20-21

20Moses and Aaron did as the Lord commanded. In the sight of Pharaoh and in the sight of his servants he alifted up the staff and struck the water in the Nile, and all the bwater in the Nile turned into blood. 21And the fish in the Nile died, and the Nile stank, so that the Egyptians ccould not drink water from the Nile. There was blood throughout all the land of Egypt.
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