Exodus 9:27-35

So Pharaoh sent, called for Moses and Aaron and said to them, “I have sinned this time. ADONAI is righteous, while I and my people are wicked. Pray to ADONAI—there has been enough of God’s thunders and hail! I will let you go. You don’t have to stay any longer.” Moses said to him, “As soon as I am gone out of the city, I will stretch out my hands to ADONAI. The thunder will cease and there will be no more hail—so you may know that the earth is ADONAI’s. But as for you and your servants, I know that you do not yet fear ADONAI Elohim.” (The flax and the barley were destroyed, because the barley was in the ear, and the flax was in bloom. But the wheat and the spelt were not destroyed, because they ripen later.) Moses went out of the city, away from Pharaoh, and stretched out his hands to ADONAI. Then the thunder and hail ceased, and rain no longer poured down on the earth. But when Pharaoh saw that the rain, the hail and the thunder had ceased, he increased his sin and hardened his heart, both he and his servants. So Pharaoh’s heart was hardened and he did not let Bnei-Yisrael go—just as ADONAI had said by Moses’ hand.