Exodus 11:9
And Jehovah had said to Moses, Pharaoh shall not hearken to you; that my wonders may be multiplied in the land of Egypt.
Exodus 7:3-4
And I will render Pharaoh's heart obdurate, and multiply my signs and my wonders in the land of Egypt.
Exodus 3:19
But I know that the king of Egypt will not let you go, no, not by a powerful hand.
Exodus 10:1
And Jehovah said to Moses, Go in unto Pharaoh; for I have hardened his heart, and the heart of his bondmen, that I might do these my signs in their midst,
Romans 9:16-18
So then it is not of him that wills, nor of him that runs, but of God that shews mercy.