Exodus 8:6-10

So Aaron extended his hand over the waters of Egypt, and the frogs came up and covered the land of Egypt.

However, the soothsayer priests did the same with their secret arts, making frogs come up on the land of Egypt.

Then Pharaoh called for Moses and Aaron and said, “Plead with the Lord to remove the frogs from me and from my people; and I will let the people go, so that they may sacrifice to the Lord.”

And Moses said to Pharaoh, “The honor is yours to tell me: when shall I plead for you and your servants and your people, that the frogs be destroyed from you and your houses, that they be left only in the Nile?”

Then he said, “Tomorrow.” So he said, “May it be according to your word, so that you may know that there is no one like the Lord our God.