Exodus 11:6-8

New Catholic Bible

⁶ A great lament will rise up in all the land of Egypt such as will never be repeated again. ⁷ But not even a dog will growl against the children of Israel, neither against humans nor animals, so that you may know that the Lord makes a distinction between Egypt and Israel. ⁸ All these servants of yours will come down to me and bow down in front of me saying, “May you and all the people who follow you leave.” After that I will leave.’ ”

Moses grew angry and left Pharaoh.