What an awful scripture is that, and how suited to Pharaoh's case. Proverbs 29:1.
Related Commentaries of Exodus 10:18
Exodus 10:18-20
18 And he went out from Pharaoh, and intreated the LORD.
19 And the LORD turned a mighty strong west wind, which took away the locusts, and castc them into the Red sea; there remained not one locust in all the coasts of Egypt.
20 But the LORD hardened Pharaoh's heart, so that he would not let the children of Israel go.