14 So the Lord said to Moses: "Pharaoh's heart is hard; he refuses to let the people go. 15 Go to Pharaoh in the morning, when he goes out to the water, and you shall stand by the river's bank to meet him; and the rod which was turned to a serpent you shall take in your hand. 16 And you shall say to him, 'The Lord God of the Hebrews has sent me to you, saying, "Let My people go, that they may serve Me in the wilderness"; but indeed, until now you would not hear! 17 Thus says the Lord: "By this you shall know that I am the Lord. Behold, I will strike the waters which are in the river with the rod that is in my hand, and they shall be turned to blood. 18 And the fish that are in the river shall die, the river shall stink, and the Egyptians will loathe to drink the water of the river." ' " 19 Then the Lord spoke to Moses, "Say to Aaron, 'Take your rod and stretch out your hand over the waters of Egypt, over their streams, over their rivers, over their ponds, and over all their pools of water, that they may become blood. And there shall be blood throughout all the land of Egypt, both in buckets of wood and pitchers of stone.' " 20 And Moses and Aaron did so, just as the Lord commanded. So he lifted up the rod and struck the waters that were in the river, in the sight of Pharaoh and in the sight of his servants. And all the waters that were in the river were turned to blood. 21 The fish that were in the river died, the river stank, and the Egyptians could not drink the water of the river. So there was blood throughout all the land of Egypt. 22 Then the magicians of Egypt did so with their enchantments; and Pharaoh's heart grew hard, and he did not heed them, as the Lord had said. 23 And Pharaoh turned and went into his house. Neither was his heart moved by this. 24 So all the Egyptians dug all around the river for water to drink, because they could not drink the water of the river.
25 And seven days passed after the Lord had struck the river.
Matthew Henry's Commentary on Exodus 7:14-25
Commentary on Exodus 7:14-25
(Read Exodus 7:14-25)
Here is the first of the ten plagues, the turning of the water into blood. It was a dreadful plague. The sight of such vast rolling streams of blood could not but strike horror. Nothing is more common than water: so wisely has Providence ordered it, and so kindly, that what is so needful and serviceable to the comfort of human life, should be cheap and almost every where to be had; but now the Egyptians must either drink blood, or die for thirst. Egypt was a pleasant land, but the dead fish and blood now rendered it very unpleasant. It was a righteous plague, and justly sent upon the Egyptians; for Nile, the river of Egypt, was their idol. That creature which we idolize, God justly takes from us, or makes bitter to us. They had stained the river with the blood of the Hebrews' children, and now God made that river all blood. Never any thirsted after blood, but sooner or later they had enough of it. It was a significant plague; Egypt had great dependence upon their river, Zechariah 14:18; so that in smiting the river, they were warned of the destruction of all the produce of their country. The love of Christ to his disciples changes all their common mercies into spiritual blessings; the anger of God towards his enemies, renders their most valued advantages a curse and a misery to them. Aaron is to summon the plague by smiting the river with his rod. It was done in the sight of Pharaoh and his attendants, for God's true miracles were not performed as Satan's lying wonders; truth seeks no corners. See the almighty power of God. Every creature is that to us which he makes it to be water or blood. See what changes we may meet with in the things of this world; what is always vain, may soon become vexatious. See what mischievous work sin makes. If the things that have been our comforts prove our crosses, we must thank ourselves. It is sin that turns our waters into blood. The plague continued seven days; and in all that time Pharaoh's proud heart would not let him desire Moses to pray for the removal of it. Thus the hypocrites in heart heap up wrath. No wonder that God's anger is not turned away, but that his hand is stretched out still.