The Doctrine and Covenants, Section 88:103-104

103 And another trump shall sound, which is the fifth trump, which is the fifth angel who committeth the everlasting gospel–flying through the midst of heaven, unto all nations, kindreds, tongues, and people;

104 And this shall be the sound of his trump, saying to all people, both in heaven and in earth, and that are under the earth–for every ear shall hear it, and every knee shall bow, and every tongue shall confess, while they hear the sound of the trump, saying: Fear God, and give glory to him who sitteth upon the throne, forever and ever; for the hour of his judgment is come.