Exodus 11:8 ASV

⁶  And there shall be a great cry throughout all the land of Egypt, such as there hath not been, nor shall be any more.

⁷  But against any of the children of Israel shall not a dog move his tongue, against man or beast: that ye may know how that Jehovah doth make a distinction between the Egyptians and Israel.

⁸  And all these thy servants shall come down unto me, and bow down themselves unto me, saying, Get thee out, and all the people that follow thee: and after that I will go out. And he went out from Pharaoh in hot anger.

⁹  And Jehovah said unto Moses, Pharaoh will 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: and Jehovah hardened Pharaoh's heart, and he did not let the children of Israel go out of his land.