Exodus 7: 14-18
And the Lord said unto Moses, Pharaoh's heart is hardened, he refuseth to let the people go.
Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river's brink against he come; and the rod which was turned to a serpent shalt thou take in thine hand.
And thou shalt say unto him, The Lord God of the Hebrews hath sent me unto thee, saying, Let my people go, that they may serve me in the wilderness: and, behold, hitherto thou wouldest not hear.
Thus saith the Lord, In this thou shalt know that I am the Lord: behold, I will smite with the rod that is in mine hand upon the waters which are in the river, and they shall be turned to blood.
And the fish that is in the river shall die, and the river shall stink; and the Egyptians shall loathe to drink of the water of the river.
Incredible- God deals with Pharoah instead of wiping Pharaoh out- He sends Moses to tell Pharaoh - The God of the Hebrews sent me unto you, saying, let my people go so that they may serve me in the wilderness. God has set His claim upon His people and yet gives Pharaoh the opportunity to release them. The Hebrew people belong to God. God wants His people returned to Him. God tells Moses to wait for Pharaoh at the river and show Pharoah how it is God who will turn the water into blood. Moses is to use the very same rod that turned into a serpent. God said then Pharaoh would know that I am God. Is God given Pharoah the benefit of the doubt - maybe he doesn't know who I am? Or is God revealing the true nature of Pharaoh's heart? God is often know by His Love, Compassion and Mercy. Some only begin to recognize God for who He is after they have been convicted perhaps even chastened by God. Others come to know God by His judgements. Sadly some never come to acknowledge God as God. There are people in our life that we wonder what is it going to take? I pray that even the hardest heart will come to know Jesus as Lord and Savior.