Exodus 10:3-7

So Moses and Aaron went to Pharaoh and said to him, “Thus says the LORD, the God of the Hebrews: ‘How long will you refuse to humble yourself before Me? Let My people go, so that they may serve Me. For if you refuse to let My people go, then hear this: tomorrow I will bring [migratory] locusts into your country. They shall cover the [visible] surface of the land, so that no one will be able to see the ground, and they will eat the rest of what has remained—that is, the vegetation left after the hail—and they will eat every one of your trees that grows in the field; your houses and those of all your servants and of all the Egyptians shall be filled with locusts, as neither your fathers nor your grandfathers have seen, from their birth until this day.’ ” Then Moses turned and left Pharaoh. Pharaoh’s servants said to him, “How long shall this man be a trap to us? Let the men go, so that they may serve the LORD their God. Do you not realize that Egypt is destroyed?”