| Barnes' Notes on the Bible The finger of God - This expression is thoroughly Egyptian; it need not imply that the magicians recognized Yahweh, the God who performed the marvel. They may possibly have referred it to as a god that was hostile to their own protectors.
Clarke's Commentary on the BibleThis is the finger of God - That is, The power and skill of God are here evident. Probably before this the magicians supposed Moses and Aaron to be conjurers, like themselves; but now they are convinced that no man could do these miracles which these holy men did, unless God were with him. God permits evil spirits to manifest themselves in a certain way, that men may see that there is a spiritual world, and be on their guard against seduction. He at the same time shows that all these agents are under his control, that men may have confidence in his goodness and power.
Gill's Exposition of the Entire BibleThen the magicians said unto Pharaoh, this is the finger of God,.... This is to be ascribed to a power superior to human, to a divine power; so long as they could do something similar, or impose upon the senses of men, and make them believe they did the like, they would not acknowledge divine omnipotence; but when they no longer could deceive the sight of Pharaoh and the Egyptian, then they own the effects of a superior power: and this they did partly to detract from the power of Moses and Aaron, because they would not have them pass for more skilful persons in the magic art than themselves; and therefore suggest, that this was done not by virtue of any human skill and art, but by the power of the Supreme Being; and partly to detract from the honour of the God of Israel; for they do not say this is the finger of Jehovah, whom they accounted, as Dr. Lightfoot (g) observes, as a petty trivial god, but this is the finger of Elohim, the Supreme Deity. It is conjectured by some (h), that in memory of this plague the Egyptian priests scrape their whole bodies, lest there should be a louse or any unclean thing on them when they worship their gods, as Herodotus (i) relates: and Pharaoh's heart was hardened, and he hearkened not unto them; either not unto the magicians owning the hand of God, and his divine power in the plague inflicted; or to Moses and Aaron demanding the dismission of the people of Israel, which latter seems to be confirmed by the usual phrase, as follows: as the Lord had said; see Exodus 7:4. (g) Ut supra. (Works, vol. 1. p. 705, 706.) (h) Vid. Scheuchzer. Physica Sacra, vol. 1. p. 132. (i) Euterpe, sive, l. 2. c. 37.
Geneva Study BibleThen the magicians said unto Pharaoh, This is {f} the finger of God: and Pharaoh's heart was hardened, and he hearkened not unto them; as the LORD had said. (f) They acknowledged that this was done by God's power and not by sorcery; Lu 11:20.
Wesley's Notes 8:19 This is the finger of God - The power of God. The devil's agents, when God permitted them, could do great things; but when he laid an embargo upon them, they could do nothing. The magicians inability in this instance shewed whence they had their ability in the former instances, and that they had no power against Moses but what was given them from above. But Pharaoh's heart was hardened - By himself and the devil.
Matthew Henry's Concise Commentary8:16-19 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.
Matthew Henry's Whole Bible CommentaryVerses 16-19 Here is a short account of the plague of lice. It does not appear that any warning was given of it before. Pharaoh's abuse of the respite granted to him might have been a sufficient warning to him to expect another plague: for if the removal of an affliction harden us, and so we lose the benefit of it, we may conclude it goes away with a purpose to return or to make room for a worse. Observe, I. How this plague of lice was inflicted on the Egyptians, v. 16, 17. The frogs were produced out of the waters, but these live out of the dust of the earth; for out of any part of the creation God can fetch a scourge, with which to correct those that rebel against him. He has many arrows in his quiver. Even the dust of the earth obeys him. "Fear not then, thou worm Jacob, for God can use thee as a threshing instrument, if he please," Isa. 41:14, 15. These lice, no doubt, were extremely vexatious, as well as scandalous, to the Egyptians. Though they had respite, they had respite but awhile, Rev. 11:14. The second woe was past, but behold the third woe came very quickly. II. How the magicians were baffled by it, v. 18. They attempted to imitate it, but they could not. When they failed in this, it should seem they attempted to remove it; for it follows, So there were lice upon man and beast, in spite of them. This forced them to confess themselves overpowered: This is the finger of God (v. 19); that is, "This check and restraint put upon us must needs be from a divine power." Note, 1. God has the devil in a chain, and limits him both as a deceiver and as a destroyer; hitherto he shall come, but no further. The devil's agents when God permitted them, could do great things; but when he laid an embargo upon them, though but with his finger, they could do nothing. The magicians' inability, in this less instance, showed whence they had their ability in the former instances which seemed greater, and that they had no power against Moses but what was given them from above. 2. Sooner or later God will extort, even from his enemies, an acknowledgment of his own sovereignty and over-ruling power. It is certain they must all (as we say) knock under at last, as Julian the apostate did, when his dying lips confessed, Thou hast overcome me, O thou Galilean! God will not only be too hard for all opposers, but will force them to own it. III. How Pharaoh, notwithstanding this, was made more and more obstinate (v. 19); even those that had deceived him now said enough to undeceive him, and yet he grew more and more obstinate. Even the miracles and the judgments were to him a savour of death unto death. Note, Those that are not made better by God's word and providences are commonly made worse by them. | 
