Helaman 6:4

And it came to pass that many of the Lamanites did come down into the land of Zarahemla, and did declare unto the people of the Nephites the manner of their conversion, and did exhort them to faith and repentance;

Many Lamanites came down to Zarahemla. They told the Nephites how they had changed. They urged them to have faith and stop sinning.

Many Lamanites came down to Zarahemla and told the Nephites their conversion stories, urging them to have faith and turn back to God.