John Gills Exposition of the Bible Commentary - Exodus 8:16
And the Lord said unto Moses ,.... On the twenty seventh day of the month, according to Bishop Usher, the same day the flogs were removed; no warning is given him of the next plague, at least there is no account of any: say unto Aaron, stretch out thy rod, and smite the dust of the land ; in some one part of the land, that place nearest to him where there was a quantity of dust; for it cannot be imagined that he should smite all the dust of the land in every part of it, but smiting one... 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