Moroni summons the Sons of Joseph

Alma 46:

18 And he said: Surely God shall not suffer that we, who are despised because we take upon us the name of Christ, shall be trodden down and destroyed, until we bring it upon us by our own transgressions⁠.

19 And when Moroni had said these words, he went forth among the people, waving the rent part of his garment in the air, that all might see the writing which he had written upon the rent part, and crying with a loud voice, saying:

20 Behold, whosoever will maintain this title upon the land, let them come forth in the strength of the Lord, and enter into a covenant that they will maintain their rights, and their religion, that the Lord God may bless them.

21 And it came to pass that when Moroni had proclaimed these words, behold, the people came running together with their armor girded about their loins, rending their garments in token, or as a covenant⁠, that they would not forsake the Lord their God; or, in other words, if they should transgress the commandments of God, or fall into transgression, and be ashamed to take upon them the name of Christ, the Lord should rend them even as they had rent their garments.