Exodus 7 - 9

Moses continues to struggle with his calling to Pharaoh at God's command.  He is given several signs to demonstrate to the Pharaoh that he is indeed a messenger from God.  Pharaoh was unimpressed with these indications and refused to release the Hebrews.  God directs Moses to pronounce a plague on the Nile River, turning it to blood for seven days.  Still the Pharaoh refused to listen.  A plague of frogs next overran Egypt, but left the ruler unmoved, as did subsequent plagues of gnats, flies, disease, boils and hail.  While Egypt suffered, the Hebrews living adjacent to them were unaffected.  Through all this, Pharaoh's heart was not softened, but became even more hardened against releasing God's people, the Hebrews.