Exodus 10:17-20

Now forgive my sin once more and pray to the LORD your God to take this deadly plague away from me.” Moses then left Pharaoh and prayed to the LORD. And the LORD changed the wind to a very strong west wind, which caught up the locusts and carried them into the Red Sea. Not a locust was left anywhere in Egypt. But the LORD hardened Pharaoh’s heart, and he would not let the Israelites go.