Mosiah 17:2

But there was one among them, whose name was Alma, he also being a descendant of Nephi. And he was a young man, and he believed the words which Abinadi had spoken, for he knew concerning the iniquity which Abinadi had testified against them: Therefore he began to plead with the king that he would not be angry with Abinadi, but suffer that he might depart in peace.

But one of them was named Alma. He was related to Nephi. He was a young man. He believed what Abinadi had said. He knew about the bad things Abinadi had told them. So he asked the king not to be angry with Abinadi. He asked the king to let Abinadi leave in peace.

But one of the priests, a young man named Alma—a descendant of Nephi—believed what Abinadi had said. He knew the prophet was right about their corruption. So he pleaded with the king to let Abinadi go in peace.