1 Nephi 1:4

From verse 4:

... in that same year there came many prophets, prophesying unto the people that they must repent, or the great city Jerusalem must be destroyed.

The Lachish Letters are a collection of potsherd writings discovered in the 1930's that date very tightly back to this time in Jerusalem's history, They seem to verify the notion that prophets were speaking out about a pending destruction and that this was not well received, as Hugh Nibley argues in this 1981 Ensign article.