Exodus 7:8-13

8Adonai told Moses and Aaron,

9“When Pharaoh speaks to you saying, ‘Prove yourselves with a miracle,’ then you are to say to Aaron, ‘Take your staff and cast it down before Pharaoh, so that it may become a serpent.’”

10So Moses and Aaron went in to Pharaoh and did as Adonai had commanded. Aaron threw down his staff before Pharaoh and before his servants, and it became a serpent.

11Then Pharaoh called for the wise men and the sorcerers, and they too, the magicians of Egypt, did the same with their secret arts.

12For each man threw down his staff, and they became serpents. But Aaron’s staff swallowed up their staffs.

13Yet Pharaoh’s heart was hardened. So he did not listen to them— just as Adonai had said.