18. So he went out from Pharaoh and prayed to the Lord.
19. Then the Lord turned a mighty strong west wind, which took away the locusts and threw them into the Red Sea. Not one locust remained in all the territory of Egypt.
20. But the Lord hardened Pharaoh’s heart, so that he would not let the children of Israel go.
21. Then the Lord said to Moses, “Stretch out your hand toward the heavens, so that there may be darkness over the land of Egypt, a darkness which may be felt.”