(Covenant of Christ) Helaman 4:5

In the 80th year of the judges’ rule over the Nephites, a small number of Nephite defectors, who had some years earlier gone over to the Lamanites and taken upon themselves the name of Lamanites, along with a small number who were actual descendants of the Lamanites — being stirred up to anger by those defectors — therefore they began a war with the Nephites.

(Covenant of Christ) Helaman 5:21

And they were very agitated, since Satan constantly stirred them up to sin.