Exodus 12:29-32

And it came to pass at midnight that the LORD struck 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 livestock. So Pharaoh rose in the night, he, all his servants, and all the Egyptians; and there was a great cry in Egypt, for there was not a house where there was not one dead. Then he called for Moses and Aaron by night, and said, “Rise, go out from among my people, both you and the children of Israel. And go, serve the LORD as you have said. Also take your flocks and your herds, as you have said, and be gone; and bless me also.”