Exodus 11:3-5

New International Version - UK

³ (The Lord made the Egyptians favourably disposed towards the people, and Moses himself was highly regarded in Egypt by Pharaoh’s officials and by the people.)

⁴ So Moses said, ‘This is what the Lord says: “About midnight I will go throughout Egypt. ⁵ Every firstborn son in Egypt will die, from the firstborn son of Pharaoh, who sits on the throne, to the firstborn son of the female slave, who is at her hand mill, and all the firstborn of the cattle as well.