Alma 24:1

And it came to pass that the Amalekites, and the Amulonites, and the Lamanites which were in the land of Amulon, and also in the land of Helam, and which was in the land of Jerusalem, and in fine, in all the land round about, which had not been converted, and had not taken upon them the name of Anti-Nephi-Lehi, were stirred up by the Amalekites, and by the Amulonites, to anger against their brethren;

The Amalekites and Amulonites and Lamanites in the lands of Amulon, Helam, and Jerusalem had not become believers. They had not taken the name Anti-Nephi-Lehi. The Amalekites and Amulonites made them angry at their brothers.

The Amalekites and Amulonites stirred up trouble among the Lamanites who hadn’t converted—those living in Amulon, Helam, Jerusalem, and all the surrounding lands. They worked them into a fury against the converts who had taken the name Anti-Nephi-Lehi.