Exodus 10:18-20

American Standard Version

¹⁸ And he went out from Pharaoh, and entreated Jehovah. ¹⁹ And Jehovah turned an exceeding strong west wind, which took up the locusts, and drove them into the Red Sea; there remained not one locust in all the border of Egypt. ²⁰ But Jehovah ^[a]hardened Pharaoh’s heart, and he did not let the children of Israel go.