Then the LORD said to Moses, "Go to Pharaoh and tell him: This is what the LORD says: Let my people go so that they can worship me.
References for Exodus 8:1
If you refuse to let them go, then I'll send a plague of frogs over your whole country.
The Nile will overflow with frogs. They'll get into your palace, into your bedroom and onto your bed, into your officials' houses, and among all your people, and even into your ovens and bread pans.
The frogs will crawl up on you, your people, and all your officials."
And the LORD said to Moses, "Tell Aaron, ‘Stretch out your hand with your shepherd's rod over the rivers, the canals, and the marshes, and make the frogs crawl up all over the land of Egypt.'"
References for Exodus 8:5
So Aaron stretched out his hand over the waters of Egypt. The frogs crawled up and covered the land of Egypt.
However, the Egyptian religious experts were able to do the same thing by their secret knowledge. They too made frogs crawl up onto the land of Egypt.
Then Pharaoh called for Moses and Aaron, and said, "If you pray to the LORD to get rid of the frogs from me and my people, then I'll let the people go so that they can offer sacrifices to the LORD."
Moses said to Pharaoh, "Have it your way. When should I pray for you and your officials and your people to remove the frogs from your houses, courtyards, and fields? They'll stay only in the Nile."
Pharaoh said, "Tomorrow!" Moses said, "Just as you say! That way you will know that there is no one like the LORD our God.
The frogs will leave you, your houses, your officials, and your people. They'll stay only in the Nile."
After Moses and Aaron had left Pharaoh, Moses cried out to the LORD about the frogs that the LORD had brought on Pharaoh.
The LORD did as Moses asked. The frogs died inside the houses, out in the yards, and in the fields.
They gathered them together in big piles, and the land began to stink.
But when Pharaoh saw that the disaster was over, he became stubborn again and wouldn't listen to them, just as the LORD had said.