Mosiah 23:38

And the remainder of them went to the land of Nephi; and a part of them returned to the land of Helam, and also brought with them the wives and the children of the guards which had been left in the land.

The rest of the Lamanites went to the land of Nephi. Some of them came back to the land of Helam. They brought the wives and children of the guards who stayed in the land.

The rest of the army went on to the land of Nephi. Then some of them came back to Helam, bringing the wives and children of the guards they’d left behind.