3 Nephi 1:27–28

And it came to pass that the ninety and third year did also pass away in peace, save it were for the Gadianton robbers, who dwelt upon the mountains, who did infest the land; for so strong were their holds and their secret places that the people could not overpower them; therefore they did commit many murders, and did do much slaughter among the people. And it came to pass that in the ninety and fourth year they began to increase in a great degree, because there were many dissenters of the Nephites who did flee unto them, which did cause much sorrow unto those Nephites who did rem ain in the land.

From section: Increasing Wickedness

From page: Gadianton Period