Exodus 10:16-20

16Then Pharaoh called for Moses and Aaron in haste; and he said, I have sinned against the LORD your God, and against you.1 17Now therefore forgive, I pray thee, my sin only this once, and entreat the LORD your God, that he may take away from me this death only. 18And he went out from Pharaoh, and entreated the LORD. 19And the LORD turned a mighty strong west wind, which took away the locusts, and cast them into the Red sea; there remained not one locust in all the land of Egypt.2 20But the LORD hardened Pharaoh’s heart, so that he would not let the children of Israel go.