How are these verses different from the corresponding verses of Isaiah in the King James Version of the Bible?

Thomas R. Valletta

“The Book of Mormon adds five phrases in these few verses, four of which stress the universality of the judgment. … The fifth addition in verse 16 is also found in the early Greek version of the Old Testament, the Septuagint. … Since the prophet Joseph Smith did not know Greek, and since there is no evidence that he had access to a copy of the Septuagint [the Greek translation of the Old Testament] when he completed his Book of Mormon translation in 1829, this addition supports the fact that Joseph Smith translated the Isaiah portion in the Book of Mormon from a more authentic ancient text” (Ludlow, Isaiah, 90–91).

The Book of Mormon Study Guide: Start to Finish

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