Exodus 7:7-9

21st Century King James Version

⁷ And Moses was fourscore years old, and Aaron fourscore and three years old when they spoke unto Pharaoh.

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.’”