And he said, Cast it on the ground. And he cast it on the ground, and it became a serpent; and Moses fled from before it.
Exodus 4:17 And you shall take this rod in your hand, with which you shall do signs.
Exodus 7:10-15 And Moses and Aaron went in to Pharaoh, and they did so as the LORD had commanded: and Aaron cast down his rod before Pharaoh...
Amos 5:19 As if a man did flee from a lion, and a bear met him; or went into the house, and leaned his hand on the wall, and a serpent bit him.