Exodus 11:4-9

Then Moses confronted Pharaoh: “GOD’s Message: ‘At midnight I will go through Egypt and every firstborn child in Egypt will die, from the firstborn of Pharaoh, who sits on his throne, to the firstborn of the slave girl working at her hand mill. Also the firstborn of animals. Widespread wailing will erupt all over the country, lament such as has never been and never will be again. But against the Israelites—man, woman, or animal—there won’t be so much as a dog’s bark, so that you’ll know that GOD makes a clear distinction between Egypt and Israel.’ “Then all these servants of yours will grovel before me, begging me to leave, ‘Leave! You and all the people who follow you!’ And I will most certainly leave.” Moses, seething with anger, left Pharaoh. GOD said to Moses, “Pharaoh’s not going to listen to a thing you say so that the signs of my presence and work are going to multiply in the land of Egypt.”