Exodus 7:11-13

11Then Pharaoh also 1called for the wise men and the sorcerers, and they too, the 2soothsayer priests of Egypt, did the same with 3their secret arts. 12For each one threw down his staff, and they turned into serpents. But Aaron’s staff swallowed their staffs. 13Yet 4Pharaoh’s heart was 5hardened, and he did not listen to them, just as the Lord had said.