NASB 1995
For this reason they could not believe, for Isaiah said again,

American Standard Version
For this cause they could not believe, for that Isaiah said again,

Berean Study Bible
For this reason they were unable to believe. For again, Isaiah says:

Douay-Rheims Bible
Therefore they could not believe, because Isaias said again:

English Revised Version
For this cause they could not believe, for that Isaiah said again,

King James Bible
Therefore they could not believe, because that Esaias said again,

World English Bible
For this cause they couldn't believe, for Isaiah said again,

Young's Literal Translation
Because of this they were not able to believe, that again Isaiah said,

John 12:39 Additional Translations ...