In the 1828-9 Original Manuscript, Joseph Smith announces Jerusalem’s destruction; see 1 Nephi 10:3…
“how that after they WARE [were] destroyd” (emphasis added).
The verse reads differently today…
“That after they SHOULD BE destroyed” (emphasis added).
“were” is also a strikethrough Joseph Smith made to the Printer’s Manuscript in 1836 while preparing for the next printing of the Book of Mormon; the words “SHOULD BE” are written above it.
“Were” was used in the first printed edition in 1830.
This change is significant in that Joseph originally dictated the event anachronistically in past tense, since based on a Book of Mormon timeline, Jerusalem’s destruction wouldn’t happen for about another 5-10 years.
see 1 Nephi 10:3, Book of Mormon Comparative (West Valley City, UT: Dan Wees, August 2017), 26-27.