Exodus 10:18

16Then Pharaoh called for Moses and Aaron in haste, and he said, “I have sinned against the LORD your God, and against you.

17Now therefore please forgive my sin again, and pray to the LORD your God, that he may also take away from me this death.”

18Moses went out from Pharaoh, and prayed to the LORD.

19The LORD sent an exceedingly strong west wind, which took up the locusts, and drove them into the Red Sea. There remained not one locust in all the borders of Egypt.

20But the LORD hardened Pharaoh’s heart, and he didn’t let the children of Israel go.