In the Book of Mormon, Ammon (/ˈæmən/)[1] is a prominent Nephite missionary and a son of King Mosiah.
Because of the fervent prayers of their parents, Alma the Younger and the four sons of Mosiah have a conversion experience much like that of Paul the Apostle; an angel appears to them on the road and rebukes them for their wickedness.
The shock puts Alma the Younger into an insensible state for a time; the specific effect on Ammon is not described, but he becomes fully converted to the Gospel and desires to serve as a missionary to the Lamanites.
When Ammon replies that he wants to live among Lamoni's people, the king, impressed, offers him one of his daughters.
From a distance he kills several with his sling and then in hand-to-hand combat cuts off the arms of every robber who attacks him.