The Lord said to Moses and Aaron, 'When Pharaoh says to you,"Perform a wonder", then you shall say yo Aaron, "Take your staff and throw it before Pharaoh, and it will become a snake." '
So Moses and Aaron went to Pharaoh and did as the Lord had commanded; Aaron threw down his staff before Pharaoh and his officials, and it became a snake.
Then Pharaoh summoned the wise men and the sorcerers; and they also, the magicians of Egypt, did the same by their secret arts. Each one threw down his staff, and they became snakes' but Aaron's staff swalowed up theirs. Still Pharaoh's heart was hardened, and he would not listen to them, as the Lord had said.