But the LORD hardened Pharaoh's heart, and he would not let them go. The Lord hardened Pharaoh's heart - He had yet another miracle to work for the complete conviction of the Egyptians and triumph of his people; and till that was wrought he permitted the natural obstinacy of Pharaoh's haughty heart to have its full sway, after each resistance of the gracious influence which was intended to soften and bring him to repentance.
Related Commentaries of Exodus 10:27
Exodus 10:27
27 But the LORD hardened Pharaoh's heart, and he would not let them go.