Exodus 11:7-9

7But not so much as a dog will growl against any of Bnei-Yisrael, neither man nor beast—so that you may know that Adonai makes a distinction between the Egyptians and Israel.

8All these servants of yours will come down to me and bow down to me, saying, ‘Get out, you and all the people who follow you!’ After that, I will go.” Then he went out from Pharaoh hot with anger.

9Adonai had said to Moses, “Pharaoh will not listen to you, so that My wonders may be multiplied in the land of Egypt.”