John Gills Exposition of the Bible Commentary - Exodus 11:5
And all the firstborn in the land of Eygpt shall die, .... By the destroying angel inflicting a disease upon them, as Josephus says F17 Antiqu. l. 2. c. 14. sect. 6. , very probably the pestilence; however, it was sudden and immediate death, and which was universal, reaching to all the firstborn that were in the families of the Egyptians in all parts of the kingdom: from the firstborn of Pharaoh that sitteth upon his throne : this periphrasis, "that sitteth upon his throne", either... 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