Exodus 7:8-13

8Now the Lord said to Moses and Aaron,

9“When Pharaoh says to you, ‘Work a miracle [to prove your authority],’ then you say to Aaron, ‘Take your staff and throw it down before Pharaoh, so that it may become a serpent.’ ”

10So Moses and Aaron came to Pharaoh, and did just as the Lord had commanded; Aaron threw down his staff before Pharaoh and his servants, and it became a serpent.

11Then Pharaoh called for the wise men [skilled in magic and omens] and the sorcerers [skilled in witchcraft], and they also, these magicians (soothsayer-priests) of Egypt, did the same with their secret arts and enchantments.

12For every man threw down his staff and they turned into serpents; but Aaron’s staff swallowed up their staffs.

13Yet Pharaoh’s heart was hardened and he would not listen to them, just as the Lord had said.