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.
All Commentaries on Exodus 9:7 Go To Exodus 9
George Leo Haydock
AD 1849
Hardened. He did not beg for a deliverance, as the beasts were dead. (Menochius)