Exodus 11:4 in the King James Version
And Moses said, Thus saith the LORD, About midnight will I go out into the midst of Egypt:
Context
3 The LORD gave the people favor in the sight of the Egyptians. Moreover, the man Moses was very great in the land of Egypt, in the sight of Pharaoh’s servants, and in the sight of the people.
4 Moses said, “This is what the LORD says: ‘About midnight I will go out into the middle of Egypt,
5 and all the firstborn in the land of Egypt shall die, from the firstborn of Pharaoh who sits on his throne, even to the firstborn of the female servant who is behind the mill, and all the firstborn of livestock.