Exodus 12:29-30

Brenton(i) 29 And it came to pass at midnight that the Lord smote all the first-born in the land of Egypt, from the first-born of Pharao that sat on the throne, to the first-born of the captive-maid in the dungeon, and the first-born of all cattle. 30 And Pharao rose up by night, and his servants, and all the Egyptians; and there was a great cry in all the land of Egypt, for there was not a house in which there was not one dead.