“When Pharaoh tells you, ‘Perform a miracle,’ you are to say to Aaron, ‘Take your staff and throw it down before Pharaoh,’ and it will become a serpent.”
Jewish Publication Society of America Version (JPS1917) - Exodus 7:9 >'When Pharaoh shall speak unto you, saying: Show a wonder for you; then thou shalt say unto Aaron: Take thy rod, and cast it down before Pharaoh, that it become a serpent.'