When Pharaoh shall speak unto you, saying, Show a miracle for you: then thou shalt say unto Aaron, Take thy rod, and cast it before Pharaoh, and it shall become a serpent.
And Moses stretched forth his rod over the land of Egypt, and Yahweh 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 Yahweh sent thunder and hail, and the fire ran along upon the ground; and Yahweh rained hail upon the land of Egypt.
Speak, and say, Thus saith the Sovereign Yahweh; Behold, I am against thee, Pharaoh king of Egypt, the great dragon that lieth in the midst of his rivers, which hath said, My river is mine own, and I have made it for myself.
But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonah: