Exodus 7:13
“And he hardened Pharaoh’s heart, that he hearkened not unto them; as the Lord had said.”
Then Pharaoh also called the wise men and the sorcerers: now the magicians of Egypt, they also did in like manner with their enchantments.
For they cast down every man his rod, and they became serpents: but Aaron’s rod swallowed up their rods.
And he hardened Pharaoh’s heart, that he hearkened not unto them; as the Lord had said.
And the Lord said unto Moses, Pharaoh’s heart is hardened, he refuseth to let the people go.
Get thee unto Pharaoh in the morning; lo, he goeth out unto the water; and thou shalt stand by the river’s brink against he come; and the rod which was turned to a serpent shalt thou take in thine hand.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“And the Lord hardened the heart of Pharaoh, and he hearkened not unto them; as the Lord had spoken unto Moses.”
“And the magicians of Egypt did so with their enchantments: and Pharaoh’s heart was hardened, neither did he hearken unto them; as the Lord had said.”
“And the Lord said unto Moses, Pharaoh’s heart is hardened, he refuseth to let the people go.”
“Then the magicians said unto Pharaoh, This is the finger of God: and Pharaoh’s heart was hardened, and he hearkened not unto them; as the Lord had said.”
“But the Lord hardened Pharaoh’s heart, so that he would not let the children of Israel go.”