ヨハン・ゴットフリート・ヘルダー
("The Pledge") is an opera in three acts by Kurt Weill. Caspar Neher wrote the German libretto after the parable "Der afrikanische Rechtspruch" ("The African Verdict") by Johann Gottfried Herder. Composed from August to October 1931, it was premiered on 10 March 1932 at the Städtische Oper in Berlin, Germany.