When Pharaoh shall speak unto you, saying, Show a miracle for proof: then you shall say unto Aaron, Take your rod, and cast it before Pharaoh, and it shall become a serpent.
And Moses stretched forth his rod over the land of Egypt, and the LORD brought an east wind upon the land all that day, and all that night; and when it was morning, the east wind brought the locusts.
And Moses stretched forth his rod toward heaven: and the LORD sent thunder and hail, and the fire ran along upon the ground; and the LORD rained hail upon the land of Egypt.
Speak, and say, Thus says the Lord GOD; Behold, I am against you, Pharaoh king of Egypt, the great monster that lies in the midst of his rivers, who has said, My river is my own, and I have made it for myself.
But he answered and said unto them, An evil and adulterous generation seeks after a sign; and there shall no sign be given to it, but the sign of the prophet Jonah: