Alma 16

Behold, now it came to pass after the people of Ammon were established in the land of Jershon, yea, and also after the Lamanites were driven out of the land, and their dead were buried by the people of the land — now their dead were not numbered because of the greatness of their numbers, neither were the dead of the Nephites numbered — but it came to pass after they had buried their dead, and also after the days of fasting, and mourning, and prayer (and it was in the sixteenth year of the reign of the judges over the people of Nephi), there began to be continual peace throughout all the land.