Exodus 10:1
“And the Lord said unto Moses, Go in unto Pharaoh: for I have hardened his heart, and the heart of his servants, that I might shew these my signs before him:”
And the Lord said unto Moses, Go in unto Pharaoh: for I have hardened his heart, and the heart of his servants, that I might shew these my signs before him:
And that thou mayest tell in the ears of thy son, and of thy son’s son, what things I have wrought in Egypt, and my signs which I have done among them; that ye may know how that I am the Lord.
And Moses and Aaron came in unto Pharaoh, and said unto him, Thus saith the Lord God of the Hebrews, How long wilt thou refuse to humble thyself before me? let my people go, that they may serve me.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“But the Lord hardened Pharaoh’s heart, so that he would not let the children of Israel go.”
“And the Lord said unto Moses, Pharaoh’s heart is hardened, he refuseth to let the people go.”
“And Moses and Aaron did all these wonders before Pharaoh: and the Lord hardened Pharaoh’s heart, so that he would not let the children of Israel go out of his land.”
“And the Lord hardened the heart of Pharaoh, and he hearkened not unto them; as the Lord had spoken unto Moses.”
“But the Lord hardened Pharaoh’s heart, and he would not let them go.”