What an awful close to the Chapter? Alas! to what an excess of obduracy and hardiness is the human heart capable of arriving. How sweet that prayer of David, Psalms 19:13.
Related Commentaries of Exodus 9:34
Exodus 9:34-35
34 And when Pharaoh saw that the rain and the hail and the thunders were ceased, he sinned yet more, and hardened his heart, he and his servants.
35 And the heart of Pharaoh was hardened, neither would he let the children of Israel go; as the LORD had spoken by Moses.c