Exodus 9:27-30

Then Pharaoh sent and called Moses and Aaron and said to them, “This time I have sinned; the LORD is in the right, and I and my people are in the wrong. Plead with the LORD, for there has been enough of God’s thunder and hail. I will let you go, and you shall stay no longer.” Moses said to him, “As soon as I have gone out of the city, I will stretch 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. But as for you and your servants, I know that you do not yet fear the LORD God.”