Exodus 11:3-5

Revised Standard Version

³ And 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 And Moses said, “Thus says the Lord: About midnight I will go forth in the midst of Egypt; ⁵ and all the first-born in the land of Egypt shall die, from the first-born of Pharaoh who sits upon his throne, even to the first-born of the maidservant who is behind the mill; and all the first-born of the cattle.