Isaiah 9:5 (King James Bible) for every battle of the warrior is with confused noise and garments rolled in blood
Here is another example of an italicized is in the King James Bible that was intentionally omitted in the original Book of Mormon text. Unlike most other cases, Joseph Smith did not add the is in his editing of this verse for the 1837 edition. The 1920 LDS edition added the is to the LDS text. For additional discussion, see 2 Nephi 13:14.
Summary: In accord with the earliest Book of Mormon reading, maintain the lack of the is in 2 Nephi 19:5.