The term 'PHARAOH's River' is a reference to the Nile, which is the longest river in the world. It runs through 11 countries in Africa and is 4, 258 miles long. The Nile has been an important source of water for irrigation and transportation since ancient times, and it was especially important to the ancient Egyptians, who built their civilization along its banks. The word 'Nile' comes from the Greek word Neilos, which means 'river valley'.