Exodus 7:8-11

8The Lord said to Moses and Aaron,

9“When Pharaoh says to you, ‘Do a miracle,’ and you say to Aaron, ‘Take your staff and throw it down before Pharaoh,’ it will become a snake.”

10When Moses and Aaron went to Pharaoh, they did so, just as the Lord had commanded them – Aaron threw down his staff before Pharaoh and his servants and it became a snake.

11Then Pharaoh also summoned wise men and sorcerers, and the magicians of Egypt by their secret arts did the same thing.