John Gills Exposition of the Bible Commentary - Exodus 11:9
And the Lord said unto Moses ,.... Not at this time when he went out from Pharaoh, but some time before this, for the words may be rendered, "the Lord had said" F24 ויאמר "dixerat autem", Junius & Tremellius, Piscator, Rivet. , for so he had, as is related, Exodus 7:3 , but the historian makes mention of it here, to show that Moses was not ignorant of the event of things; he knew that Pharaoh's heart would be hardened from time to time, and that one plague after another must be... read more
Matthew Henry's Complete Commentary - Exodus 11:4-10
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 (Exod. 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. See how slow God is to wrath, and how willing to be met with in the way of his judgments, and to have his anger turned away, and particularly how... read more