And all the firstborn in the land of Eygpt shall die
By the destroying angel inflicting a disease upon them, as Josephus says F17, 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 belongs to Pharaoh, and is a description of him who now sat upon the throne of Egypt; and the Septuagint version leaves out the pronoun "his"; and so it is the same as if it had been said the firstborn of Pharaoh, king of Egypt; or else, to the firstborn, and describes him who either already sat upon the throne with his father, as was sometimes the case, that the firstborn was taken a partner in the throne, in the lifetime of his father; or who was the presumptive heir of the crown, and should succeed him, and so the Targum of Jonathan,
``who shall or is to sit upon the throne of his kingdom:''even unto the firstborn of the maidservant that is behind the mill;