Aminadab is mentioned in Helaman 5:34-41. He is said to have been a righteous Nephite. However, evidently he fell away from the Church, and became associated with the Lamanites, as a guard in their prisons. In the Book of Helaman, after Nephi had given up the Chief Judgment Seat to Cezoram, he and his brother Lehi went to the land of Zarahemla to preach the Gospel to the Lamanites. They are taken prisoners by the Lamanites, and kept under guard.