Exodus 12:29
Now at midnight the LORD struck down every firstborn male in the land of Egypt, from the firstborn of Pharaoh, who sat on his throne, to the firstborn of the prisoner in the dungeon, as well as all the firstborn among the livestock.
What it says
At midnight the LORD strikes every firstborn in Egypt, from Pharaoh’s firstborn to the prisoner’s, and the firstborn of the livestock as well.
What it is doing
It states the full reach of the plague across the land.
In context
29Now at midnight the LORD struck down every firstborn male in the land of Egypt, from the firstborn of Pharaoh, who sat on his throne, to the firstborn of the prisoner in the dungeon, as well as all the firstborn among the livestock. 30During the night Pharaoh got up — he and all his officials and all the Egyptians — and there was loud wailing in Egypt; for there was no house without someone dead.