I will sever ... - This severance constituted a specific difference between this and the preceding plagues. Pharaoh could not of course attribute the exemption of Goshen from a scourge, which fell on the valley of the Nile, to an Egyptian deity, certainly not to Chepera (see the last note), a special object of worship in Lower Egypt.

I will sever in that day - הפליתי hiphleythi, has been translated by some good critics, I will miraculously separate; so the Vulgate: Faciam mirabilem, "I will do a marvellous thing." And the Septuagint, παραδοξασω, I will render illustrious the land of Goshen in that day; and this he did, by exempting that land, and its inhabitants the Israelites, from the plagues by which he afflicted the land of Egypt.

And I will sever in that day the land of Goshen, in which my people dwell,.... Distinguish it from other parts of the land of Egypt:

that no swarms of flies shall be there; which was a very wonderful thing, and so the word may be rendered. "I will marvellously sever or separate" (o), and so the Targum of Jonathan, "I will do wonders or miracles in that day": as they were to make such a difference in one part of the country from another, and so near as Goshen was to the place where Pharaoh lived, and to bound and limit such sort of creatures as flies, which move swiftly from place to place, and particularly to keep the land of Goshen clear of them; when, as Bishop Patrick observes, it was a country that abounded with cattle, whose dung is apt to breed flies:

to the end thou mayest know that I am the Lord in the midst of the earth; he is God over all the earth, and rules as a King in the midst of it, and does whatsoever he pleases in it; see Psalm 74:12 and in the midst of the land of Goshen where his people dwelt, and over whom he was King in a peculiar manner, and took a peculiar care of them, to protect and defend them; and which must the more vex and distress the Egyptians, when they saw the Israelites clear of those plagues they were afflicted with.

(o) "faciamque mirabilem", V. L. "miraculose agam", Fagius; "marvellously sever", Ainsworth.

And I will sever in that day the land of Goshen, in which my people dwell, that no swarms of flies shall be there; to the end thou mayest know that I am the LORD in the midst of the earth.

8:22 Know that I am the Lord in the midst of the earth - In every part of it. Swarms of flies, which seem to us to fly at random, shall be manifestly under the conduct of an intelligent mind. Hither they shall go, saith Moses, and thither they shall come, and the performance is punctual according to this appointment; and both compared amount to a demonstration, that he that said it, and he that did it, was the same, even a being of infinite power and wisdom.

8:20-32 Pharaoh was early at his false devotions to the river; and shall we be for more sleep and more slumber, when any service to the Lord is to be done? The Egyptians and the Hebrews were to be marked in the plague of flies. The Lord knows them that are his, and will make it appear, perhaps in this world, certainly in the other, that he has set them apart for himself. Pharaoh unwillingly entered into a treaty with Moses and Aaron. He is content they should sacrifice to their God, provided they would do it in the land of Egypt. But it would be an abomination to God, should they offer the Egyptian sacrifices; and it would be an abomination to the Egyptians, should they offer to God the objects of the worship of the Egyptians, namely, their calves or oxen. Those who would offer acceptable sacrifice to God, must separate themselves from the wicked and profane. They must also retire from the world. Israel cannot keep the feast of the Lord, either among the brick-kilns or among the flesh-pots of Egypt. And they must sacrifice as God shall command, not otherwise. Though they were in slavery to Pharaoh, yet they must obey God's commands. Pharaoh consents for them to go into the wilderness, provided they do not go so far but that he might fetch them back again. Thus, some sinners, in a pang of conviction, part with their sins, yet are loth they should go very far away; for when the fright is over, they will turn to them again. Moses promised the removal of this plague. But let not Pharaoh deal deceitfully any more. Be not deceived; God is not mocked: if we think to cheat God by a sham repentance and a false surrender of ourselves to him, we shall put a fatal cheat upon our own souls. Pharaoh returned to his hardness. Reigning lusts break through the strongest bonds, and make men presume and go from their word. Many seem in earnest, but there is some reserve, some beloved, secret sin. They are unwilling to look upon themselves as in danger of everlasting misery. They will refrain from other sins; they do much, give much, and even punish themselves much. They will leave it off sometimes, and, as it were, let their sin depart a little way; but will not make up their minds to part with all and follow Christ, bearing the cross. Rather than that, they venture all. They are sorrowful, but depart from Christ, determined to keep the world at present, and they hope for some future season, when salvation may be had without such costly sacrifices; but, at length, the poor sinner is driven away in his wickedness, and left without hope to lament his folly.