Exodus 9:27-35

27Then Pharaoh summoned Moses and Aaron. “This time I have sinned,” he said. “The LORD is righteous, and I and my people are wicked. 28Pray to the LORD, for there has been enough of God’s thunder and hail. I will let you go; you do not need to stay any longer.”

29Moses said to him, “When I have left the city, I will spread out my hands to the LORD. The thunder will cease, and there will be no more hail, so that you may know that the earth is the LORD’s. 30But as for you and your officials, I know that you still do not fear the LORD our God.”

31(Now the flax and barley were destroyed, since the barley was ripe and the flax was in bloom; 32but the wheat and spelt were not destroyed, because they are late crops.)

33Then Moses departed from Pharaoh, went out of the city, and spread out his hands to the LORD. The thunder and hail ceased, and the rain no longer poured down on the land.

34When Pharaoh saw that the rain and hail and thunder had ceased, he sinned again and hardened his heart—he and his officials. 35So Pharaoh’s heart was hardened, and he would not let the Israelites go, just as the LORD had said through Moses.