The 136-bar prelude that opens it is meant to represent the eternal, unchanging motions of the river.
In the beginning of it, Woglinde, Wellgunde and Flosshilde sing and play with each other and mock the advances of the dwarf Alberich, who then decides steal their treasure. He then forces his brother Mime [Mi-meh] to create the Tarnhlem. The 136-bar prelude that opens it is meant to represent the eternal, unchanging motions of the river. FTP, identify this Wagner opera, the first of his tetrad the Der Ring des Nibelungen.
In the beginning of it, Woglinde, Wellgunde and Flosshilde sing and play with each other and mock the advances of the dwarf Alberich, who then decides steal their treasure.
Das {Rheingold} (The {Rhine Gold})