The Bible does not provide a clear answer to this question. Some scholars believe that Isaiah died during the reign of King Manasseh, who ruled Judah from \approx imately 697 to 642 BCE. If this is the case, then Isaiah would have been in his eighties or nineties at the time of his death. However, other scholars believe that Isaiah may have lived longer, and that he may have prophesied during the reigns of several different kings. Ultimately, the exact age at which Isaiah died remains uncertain.
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