Zechariah 7:11-12. Reader! observe the increasing obduracy of the heart! What an awful question is that of Job? Job 9:4.
Related Commentaries of Exodus 9:7
Exodus 9:7
7 And Pharaoh sent, and, behold, there was not one of the cattle of the Israelites dead. And the heart of Pharaoh was hardened, and he did not let the people go.