But not a dog shall growl against any of the people of Israel, either man or beast, that you may know that the LORD makes a distinction between Egypt and Israel.’
Warning is here given to Pharaoh of the last and conquering plague which was now to be inflicted. This was the death of all the first-born in Egypt at once, which had been first threatened (Exo 4:23, I will slay thy son, thy first-born), but is last executed; less judgments were tried, which, if they had done the work would have prevented this.
Commenting on Exodus 11:4-10
But against any of the children of Israel shall not a dog move his tongue, against man or beast,.... That is, as no hurt should be done to man or beast among them, to the firstborn of either of them, so there would be no noise or cry in their dwellings, but the profoundest silence, stillness, and quietness among them; though this is generally understood...
against any of the children of Israel shall not a dog move his tongue--No town or village in Egypt or in the East generally is free from the nuisance of dogs, who prowl about the streets and make the most hideous noise at any passers-by at night.