The Lamanite Converts were a group of about three hundred who were converted in a Lamanite prison after seizing Nephi and Lehi, the sons of Helaman. An army of Lamanites had taken the two brothers and cast them into prison, and after many days without food came in to slay them (Helaman 5:21-22). Nephi and Lehi were encircled as if by fire but were not burned, and the Lamanites and Nephite dissenters in the prison stood amazed and did not dare touch them (Helaman 5:23-25). The earth shook, a cloud of darkness overshadowed them, and a voice spoke three times, telling them to repent and stop seeking to destroy God’s servants (Helaman 5:27-33).
One of them, a Nephite by birth who had dissented from the church, turned and saw the faces of Nephi and Lehi shining as they looked toward heaven, and called the others to look (Helaman 5:35-37). When they asked who the brothers were speaking with, this man, named Aminadab, told them they were conversing with the angels of God (Helaman 5:38-39). Aminadab told them to repent and cry to the voice until they had faith in Christ, and the cloud of darkness would be removed (Helaman 5:40-41). They cried out until the darkness dispersed, then saw themselves encircled by a pillar of fire; the Holy Spirit entered their hearts and the heavens opened, and angels came down and ministered to them (Helaman 5:42-48).
About three hundred saw and heard these things and were told to go forth and not doubt (Helaman 5:49). They ministered throughout the surrounding regions, and most of the Lamanites were convinced, laid down their weapons and the traditions of their fathers, and gave up to the Nephites the lands they had taken (Helaman 5:50-52). By the end of the sixty-second year of the reign of the judges, the greater part of the Lamanites had become a righteous people whose faith exceeded that of the Nephites (Helaman 6:1).