Then Adonai said to Moses, “Stretch out your hand, and take it by the tail.” So he put out his hand, laid hold of it, and it became a staff in his hand.
“When Pharaoh speaks to you saying, ‘Prove yourselves with a miracle,’ then you are to say to Aaron, ‘Take your staff and cast it down before Pharaoh, so that it may become a serpent.’”