EXODUS 7
Moses and Aaron are ordered to go to Pharaoh, and require the dismission of the people of Israel, but they are told before hand that Pharaoh’s heart would be hardened, and would refuse to let them go, until the hand of the Lord was stretched out, and great judgments were brought down upon, Egypt, and then they should come forth, Ex 7:1, which orders Moses and Aaron obeyed, and their age is observed, when this was done, Ex 7:6 and they are bid to work a miracle, when Pharaoh should demand one, by turning a rod into a serpent, which they did; but Pharaoh’s magicians doing the same in appearance, his heart was hardened, Ex 7:8 and then they are directed to meete him at the river, and require the same as before; and if he refused, to smite the waters of the river with the rod, and turn them into bld, which they did, Ex 7:15, but Pharaoh’s magicians doing the same by enchantments, he did not regard it, though the plague lasted seven days, Ex 7:22.
EXODUS 8
In this chapter Pharaoh is threatened with the plague of frogs, in case he refused to let Israel go, which accordingly was brought upon him, Ex 8:1 and though the magicians did something similar to it, yet these were so troublesome to Pharaoh, that he promised to let the people go, and sacrifice to God, if they removed; and a time being fixed for the removal of them, it was accordingly done at the entreaty of Moses and Aaron, Ex 8:7 but there being a respite, Pharaoh’s heart was hardened, and the plague of lice is ordered, and which was executed; and though this the magicians essayed to do, and could not, but owned it to be the finger of God, yet Pharaoh’s heart was hardened, Ex 8:15 wherefore he is threatened with a swarm of flies, which should not infest Goshen, only the places where the Egyptians dwelt, and it was so, Ex 8:20 upon which Pharaoh called for Moses, and declared himself willing the people would sacrifice in the land; but this not being satisfactory, he agreed they should go into the wilderness, but not so far; and on the account of the entreaty of Moses, the plague was removed; but still Pharaoh’s heart was hardened, and he would not let the people go, Ex 8:25.
EXODUS 9
This chapter relates the plague of murrain upon the cattle, and which yet was not upon the cattle of the Israelites, Ex 9:1 and the plague of boils and blains on man and beast, Ex 9:8 and Pharaoh’s heart being hardened, Moses is sent to him with a message from the Lord, threatening him that all his plagues should come upon him, and particularly the pestilence, if he would not let Israel go; and signifying, that to show his power in him, and declare his name throughout the earth, had he raised him up, and a kind of amazement is expressed at his obstinacy and pride, Ex 9:12, and he is told that a terrible storm of hail should fall upon the land, and destroy all in the field; wherefore those that regarded the word of the Lord got their cattle within doors, but those that did not took no care of them, Ex 9:18 and upon Moses’s stretching out his hand, when ordered by the Lord, the storm began, and destroyed every thing in the field throughout the land, excepting the land of Goshen, Ex 9:22 upon which Pharaoh sent for Moses and Aaron, acknowledged his sin, and the justice of God, begged they would entreat for him, which Moses did; but when the storm was over, Pharaoh’s heart was still more hardened, and he refused to let the people go, Ex 9:27.
Taken from John Gill’s Exposition of the Bible, published roughly around 1748-1760.