Berean Standard Bible
John 12:38
“This was to fulfill the word of Isaiah the prophet: “Lord, who has believed our message? And to whom has the arm of the Lord been revealed?””

In context
37Although Jesus had performed so many signs in their presence, they still did not believe in Him.
38This was to fulfill the word of Isaiah the prophet: “Lord, who has believed our message? And to whom has the arm of the Lord been revealed?”
39For this reason they were unable to believe. For again, Isaiah says:
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Berean Standard Bible · A modern, readable English translation. Public domain (CC0).