If thirty-six million people say a foolish thing, it is still a foolish thing.
Sometimes misquoted as: If a million people say a foolish thing, it is still a foolish thing.
In French: "Une bêtise répétée par trente-six millions de bouches ne cesse pas d'être une bêtise" - Pensées de Anatole France (Calmann-Lévy, 1925), p. 152