Exodus 11:9
And Jehovah said unto Moses, Pharaoh will not hearken unto you; that my wonders may be multiplied in the land of Egypt.
Exodus 7:3-4
And I will harden Pharaoh's heart, and multiply my signs and my wonders in the land of Egypt.
Exodus 3:19
And I know that the king of Egypt will not give you leave to go, no, not by a mighty hand.
Exodus 10:1
And Jehovah said unto Moses, Go in unto Pharaoh: for I have hardened his heart, and the heart of his servants, that I may show these my signs in the midst of them,
Romans 9:16-18
So then it is not of him that willeth, nor of him that runneth, but of God that hath mercy.