Exodus 7, 18 – 20 „The fish in the Nile will die, and the Nile itself will stink so that the Egyptians will be unable to drink water from the Nile. 19The LORD then spoke to Moses: Speak to Aaron: Take your staff and stretch out your hand over the waters of Egypt—its streams, its canals, its ponds, and all its supplies of water—that they may become blood. There will be blood throughout the land of Egypt, even in the wooden pails and stone jars. 20This, then, is what Moses and Aaron did, exactly as the LORD had commanded. Aaron raised his staff and struck the waters in the Nile in full view of Pharaoh and his servants, and all the water in the Nile was changed into blood”.