John 12:40
King James Version
“He hath blinded their eyes, and hardened their heart; that they should not see with eyes, nor understand with heart, and be converted, and I should heal them.”
Context
37But though he had done so many miracles before them, yet they believed not on him:
38That the saying of Esaias the prophet might be fulfilled, which he spake, Lord, who hath believed our report? and to whom hath the arm of the Lord been revealed?
39Therefore they could not believe, because that Esaias said again,
40He hath blinded their eyes, and hardened their heart; that they should not see with eyes, nor understand with heart, and be converted, and I should heal them.
41These things said Esaias, when he saw his glory, and spake of him.
42Nevertheless among the chief rulers also many believed on him; but because of the Pharisees they did not confess lest they should be put out of the synagogue:
43For they loved the praise of men more than the praise of God.