Exodus 12:29-33

29At midnight the Lord struck down all the firstborn in the land of Egypt, from the firstborn of Pharaoh who sat on his throne to the firstborn of the captive who was in the dungeon, and all the firstborn of the livestock.

30And Pharaoh rose up in the night, he and all his servants and all the Egyptians. And there was a great cry in Egypt, for there was not a house where someone was not dead.

31Then he summoned Moses and Aaron by night and said, "Up, go out from among my people, both you and the people of Israel; and go, serve the Lord, as you have said.

32Take your flocks and your herds, as you have said, and be gone, and bless me also!"

33The Egyptians were urgent with the people to send them out of the land in haste. For they said, "We shall all be dead."