https://www.btstories.com/pharaohs-plagues/
The Lord told Moses and Aaron to go to Pharaoh in the morning when he was walking next to the Nile River. Moses said, “Because you refuse to free our people, the waters of Egypt will turn to blood. The fish will die and the water will be undrinkable.” Aaron then struck the water with his staff and it turned into blood.
The court magicians also turned some water into blood. Therefore, Pharaoh ignored Moses and Aaron. Soon the water throughout the land turned to blood and was undrinkable. The people had to dig wells to find fresh water.
