Exodus 8:9-10

Moses said to Pharaoh, “The honor is yours to tell me: when shall I entreat for you and your servants and your people, that the frogs be destroyed from you and your houses, that they may be left only in the Nile?” Then he said, “Tomorrow.” So he said, “May it be according to your word, that you may know that there is no one like the LORD our God.