2 Nephi 25
The Jews will begin to believe the Book of Mormon when they no longer look for a messiah other than Christ – that may mean that they will not accept the restored gospel in large numbers until after the Lord saves them as he appears unto them. I imagine that he will then tell them that they should seek out this record of his other sheep. It might also refer to those scattered of Israel who are among the nations of the Gentiles who are beginning to be gathered now as tey no longer look for the Messiah and do not even recognize that they are of the house of Israel.