Exodus 7:8-10

21st Century King James Version

⁸ And the Lord spoke unto Moses and unto Aaron, saying,

⁹ “When Pharaoh shall speak unto you, saying, ‘Show a miracle for yourselves,’ then thou shalt say unto Aaron, ‘Take thy rod and cast it before Pharaoh, and it shall become a serpent.’”

¹⁰ And Moses and Aaron went in unto Pharaoh, and they did so as the Lord had commanded; and Aaron cast down his rod before Pharaoh and before his servants, and it became a serpent.