7 But among all the sons of Israel, from man to beast, not a dog shall move his tongue, that ye may know that the Lord shall make a difference between the Egyptians and the Israelites.
8 And all these thy slaves shall come down unto me and bow down themselves unto me, saying, Go out, and all the people that follow thee; and after that I will go out. And he went out from Pharaoh in a great anger.
9 And the Lord said unto Moses, Pharaoh shall not hearken unto you, that my wonders may be multiplied in the land of Egypt.
10 And Moses and Aaron did all these wonders before Pharaoh: but the Lord had hardened Pharaoh’s heart, so that he would not let the sons of Israel go out of his land.