17:20 And as Ammon entered the land of Ishmael, the Lamanites took him and bound him, as was their custom to bind all the Nephites who fell into their hands, and carry them before the king; and thus it was left to the pleasure of the king to slay them, or to retain them in captivity, or to cast them into prison, or to cast them out of his land, according to his will and pleasure.

 17:21 And thus Ammon was carried before the king who was over the land of Ishmael; and his name was Lamoni; and he was a descendant of Ishmael.