Wesley's Notes on the Bible
And the LORD said unto Moses, See, I have made thee a god to Pharaoh: and Aaron thy brother shall be thy prophet.
7:1 I have made thee a god to Pharaoh - That is, my representative in this affair, as magistrates are called gods, because they are God's vicegerents. He was authorized to speak and act in God's name, and endued with a divine power, to do that which is above the ordinary course of nature. And Aaron shall be thy prophet - That is, he shall speak from thee to Pharaoh, as prophets do from God to the children of men. Thou shalt as a god inflict and remove the plagues, and Aaron as a prophet shall denounce them.
Thou shalt speak all that I command thee: and Aaron thy brother shall speak unto Pharaoh, that he send the children of Israel out of his land.
And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.
But Pharaoh shall not hearken unto you, that I may lay my hand upon Egypt, and bring forth mine armies, and my people the children of Israel, out of the land of Egypt by great judgments.
And the Egyptians shall know that I am the LORD, when I stretch forth mine hand upon Egypt, and bring out the children of Israel from among them.
And Moses and Aaron did as the LORD commanded them, so did they.
And Moses was fourscore years old, and Aaron fourscore and three years old, when they spake unto Pharaoh.
7:7 Moses was fourscore years old - Joseph, who was to be only a servant to Pharaoh, was preferred at thirty years old; but Moses, who was to be a god to Pharaoh, was not so dignified till he was eighty years old. It is fit he should long wait for such an honour, and be long in preparing for such a service.
And the LORD spake unto Moses and unto Aaron, saying,
When Pharaoh shall speak unto you, saying, Shew a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent.
7:9 Say unto Aaron, Take thy rod - This Moses ordinarily held in his hand, and delivered it to Aaron upon occasion, for the execution of his commands.
And Moses and Aaron went in unto Pharaoh, and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh, and before his servants, and it became a serpent.
7:10 And Aaron cast his rod down, and it became a serpent - This was proper not only to affect Pharaoh with wonder, but to strike a terror upon him. This first miracle, though it was not a plague, yet amounted to the threatening of a plague; if it made not Pharaoh feel, it made him fear; this is God's method of dealing with sinners he comes upon them gradually.
Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments.
7:11 Moses had been originally instructed in the learning of the Egyptians, and was suspected to have improved in magical arts in his long retirement. The magicians are therefore sent for to vie with him. The two chief of them were Jannes and Jambres. Their rods became serpents; probably by the power of evil angels artfully substituting serpents in the room of the rods, God permitting the delusion to be wrought for wise and holy ends. But the serpent which Aaron's rod was turned into, swallowed up the others, which was sufficient to have convinced Pharaoh on which side the right lay.
For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods.
And he hardened Pharaoh's heart, that he hearkened not unto them; as the LORD had said.
7:13 And he harden'd Pharaoh's heart - That is, permitted it to be hardened.
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 lothe to drink of the water of the river.
And the LORD spake unto Moses, Say unto Aaron, Take thy rod, and stretch out thine hand upon the waters of Egypt, upon their streams, upon their rivers, and upon their ponds, and upon all their pools of water, that they may become blood; and that there may be blood throughout all the land of Egypt, both in vessels of wood, and in vessels of stone.
And Moses and Aaron did so, as the LORD commanded; and he lifted up the rod, and smote 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.
7:20 The waters that were in the river were turned into blood - This was a plague justly inflicted upon the Egyptians; for Nilus the river of Egypt was their idol; they and their land had so much benefit by that creature, that they served and worshipped it more than the creator. Also they had stained the river with the blood of the Hebrew children, and now God made that river all bloody; thus he gave them blood to drink, for they were worthy, Rev 16:6. See the power of God. Every creature is that to us which he makes it to be, water or blood. See the mutability of all things under the sun, and what changes we may meet with in them. That which is water to day may be blood to morrow; what is always vain may soon become vexatious. And see what mischievous work sin makes! It is sin that turns our waters into blood.
And the fish that was in the river died; and the river stank, and the Egyptians could not drink of the water of the river; and there was blood throughout all the land of Egypt.
And the magicians of Egypt did so with their enchantments: and Pharaoh's heart was hardened, neither did he hearken unto them; as the LORD had said.
7:22 And the magicians did so - By God's permission with their enchantments; and this served Pharaoh for an excuse not to set his heart to this also, (Ex 7:23,) and a poor excuse it was. Could they have turned the river of blood into water again, it had been something; then they had proved their power, and Pharaoh had been obliged to them as his benefactors.
And Pharaoh turned and went into his house, neither did he set his heart to this also.
And all the Egyptians digged round about the river for water to drink; for they could not drink of the water of the river.
And seven days were fulfilled, after that the LORD had smitten the river.
7:25 Seven days were fulfilled - Before this plague was removed.