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 part served for the whole: that it may become lice throughout all the land of Egypt: not gnats, as some, nor flies, as others, but lice, though perhaps not of the common and ordinary sort, but new and extraordinary, and it may be of different sorts, suitable to different creatures.