Exodus 8:1-4

Then the LORD said to Moses, “Go to Pharaoh and say to him, ‘Thus says the LORD, “Let My people go, that they may serve Me. But if you refuse to let them go, behold, I will smite your whole territory with frogs. The Nile will swarm with frogs, which will come up and go into your house and into your bedroom and on your bed, and into the houses of your servants and on your people, and into your ovens and into your kneading bowls. So the frogs will come up on you and your people and all your servants.” ’ ”