Exodus 8:6-10

And Aaron stretched out his hand over the waters of Egypt; and the frogs came up, and covered the land of Egypt.

And the magicians did so with their enchantments, and brought up frogs upon the land of Egypt.

Then Pharaoh called for Moses and Aaron, and said, Intreat the LORD, that he may take away the frogs from me, and from my people; and I will let the people go, that they may do sacrifice unto the LORD.

And Moses said unto Pharaoh, Glory over me: when shall I intreat for thee, and for thy servants, and for thy people, to destroy the frogs from thee and thy houses, that they may remain in the river only?

And he said, To morrow. And he said, Be it according to thy word: that thou mayest know that there is none like unto the LORD our God.