John 12:39 in the King James Version
Therefore they could not believe, because that Esaias said again,
Context
38 that the word of Isaiah the prophet might be fulfilled, which he spoke: “Lord, who has believed our report? To whom has the arm of the Lord been revealed?”
39 For this cause they couldn’t believe, for Isaiah said again:
40 “He has blinded their eyes and he hardened their heart, lest they should see with their eyes, and perceive with their heart, and would turn, and I would heal them.”