9 Then Jehovah said to Moses: »Pharaoh will not listen to you, so that my signs will be multiplied in the land of Egypt.«
Exodus 11:9 Cross References - NSB
Exodus 3:19
19 »I know that the king of Egypt will not permit you to go, except under compulsion.
Exodus 7:3-4
Exodus 10:1
1 Jehovah told Moses: »Go back to the king. I have made him and his officials stubborn, so that I could work these signs.
Romans 9:16-18
16 So then it does not depend on mans will or effort, but on God who shows mercy.
17 The scripture says to Pharaoh: »For this reason I have raised you up, that I might through you, show my power and declare my name in all the earth.«
18 He shows mercy to the one he chooses, and he allows others to be stubborn.