Parallel
John 12:39
Patriarchal Greek New Testament (1904) · Berean Standard Bible
διὰ τοῦτο οὐκ ἠδύναντο πιστεύειν, ὅτι πάλιν εἶπεν Ἡσαΐας·
For this reason they were unable to believe. For again, Isaiah says: