Exodus 7:11-12

7:11 Then Pharaoh also summoned wise men and sorcerers, and the magicians of Egypt by their secret arts did the same thing. 7:12 Each man threw down his staff, and the staffs became snakes. But Aaron’s staff swallowed up their staffs.

Exodus 7:22

7:22 But the magicians of Egypt did the same by their secret arts, and so Pharaoh’s heart remained hard, and he refused to listen to Moses and Aaron – just as the Lord had predicted.