Exodus 11:7-9

71But against any of the sons of Israel a dog will not even 2bark, whether against man or beast, that you may 3understand how the Lord makes a distinction between Egypt and Israel.’ 84All these your servants will come down to me and bow themselves 5before me, saying, ‘Go out, you and all the people who 6follow you,’ and after that I will go out.” 7And he went out from Pharaoh in hot anger.

9Then the Lord said to Moses, “8Pharaoh will not listen to you, so 9that My wonders will be multiplied in the land of Egypt.”