John Gills Exposition of the Bible Commentary - Exodus 8:19
Then 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... read more
Matthew Henry's Complete Commentary - Exodus 8:16-19
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, Exod. 8:16, 17. The frogs were produced out... read more