Exodus 7:12 ASV

¹⁰  And Moses and Aaron went in unto Pharaoh, and they did so, as Jehovah had commanded: and Aaron cast down his rod before Pharaoh and before his servants, and it became a serpent.

¹¹  Then Pharaoh also called for the wise men and the sorcerers: and they also, the magicians of Egypt, did in like manner with their enchantments.

¹²  For they cast down every man his rod, and they became serpents: but Aaron's rod swallowed up their rods.

¹³  And Pharaoh's heart was hardened, and he hearkened not unto them; as Jehovah had spoken.

¹⁴  And Jehovah said unto Moses, Pharaoh's heart is stubborn, he refuseth to let the people go.