TSK · Exodus 7:9

Yahweh said to him, "What is that in your hand?" He said, "A rod."

You shall take this rod in your hand, with which you shall do the signs."

Moses and Aaron went in to Pharaoh, and they did so, as Yahweh had commanded: and Aaron cast down his rod before Pharaoh and before his servants, and it became a serpent.

Moses stretched forth his rod over the land of Egypt, and Yahweh brought an east wind on the land all that day, and all the night; and when it was morning, the east wind brought the locusts.

"Ask a sign of Yahweh your God; ask it either in the depth, or in the height above."

But he answered them, "An evil and adulterous generation seeks after a sign, but no sign will be given it but the sign of Jonah the prophet.

They said therefore to him, "What then do you do for a sign, that we may see, and believe you? What work do you do?