16 And the Lord said to Moses, Say to Aaron, Let your rod be stretched out over the dust of the earth so that it may become insects through all the land of Egypt. 17 And they did so; and Aaron, stretching out the rod in his hand, gave a touch to the dust of the earth, and insects came on man and on beast; all the dust of the earth was changed into insects through all the land of Egypt. 18 And the wonder-workers with their secret arts, attempting to make insects, were unable to do so: and there were insects on man and on beast. 19 Then the wonder-workers said to Pharaoh, This is the finger of God: but Pharaoh's heart was hard, and he did not give ear to them, as the Lord had said.
20 And the Lord said to Moses, Get up early in the morning and take your place before Pharaoh when he comes out to the water; and say to him, This is what the Lord says: Let my people go to give me worship. 21 For if you do not let my people go, see, I will send clouds of flies on you and on your servants and on your people and into their houses; and the houses of the Egyptians and the land where they are will be full of flies. 22 And at that time I will make a division between your land and the land of Goshen where my people are, and no flies will be there; so that you may see that I am the Lord over all the earth. 23 And I will put a division between my people and your people; tomorrow this sign will be seen. 24 And the Lord did so; and great clouds of flies came into the house of Pharaoh and into his servants' houses, and all the land of Egypt was made waste because of the flies. 25 And Pharaoh sent for Moses and Aaron and said, Go and make your offering to your God here in the land. 26 And Moses said, It is not right to do so; for we make our offerings of that to which the Egyptians give worship; and if we do so before their eyes, certainly we will be stoned. 27 But we will go three days' journey into the waste land and make an offering to the Lord our God as he may give us orders. 28 Then Pharaoh said, I will let you go to make an offering to the Lord your God in the waste land; but do not go very far away, and make prayer for me. 29 And Moses said, When I go out from you I will make prayer to the Lord that the cloud of flies may go away from Pharaoh and from his people and from his servants tomorrow: only let Pharaoh no longer by deceit keep back the people from making their offering to the Lord. 30 Then Moses went out from Pharaoh and made prayer to the Lord. 31 And the Lord did as Moses said, and took away the cloud of flies from Pharaoh and from his servants and from his people; not one was to be seen. 32 But again Pharaoh made his heart hard and did not let the people go.
Matthew Henry's Commentary on Exodus 8:16-32
Commentary on Exodus 8:16-19
(Read Exodus 8:16-19)
These lice were produced out of the dust of the earth; out of any part of the creation God can fetch a scourge, with which to correct those who rebel against him. Even the dust of the earth obeys him. These lice were very troublesome, as well as disgraceful to the Egyptians, whose priests were obliged to take much pains that no vermin ever should be found about them. All the plagues inflicted on the Egyptians, had reference to their national crimes, or were rendered particularly severe by their customs. The magicians attempted to imitate it, but they could not. It forced them to confess, This is the finger of God! The check and restraint put upon us, must needs be from a Divine power. Sooner or later God will force even his enemies to acknowledge his own power. Pharaoh, notwithstanding this, was more and more obstinate.
Commentary on Exodus 8:20-32
(Read Exodus 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.