"the chorus from the Water-Carrier"
Les deux journées, ou Le porteur d'eau (The Two Days, or The Water-Carrier) is an opera by Cherubini (see bookmark to Page 484. "her favourite opera by Cherubini"). It is considered to be one of his best, although it fell out of favour over the last century. Beethoven kept a copy of this opera on his desk while he was composing Fidelio.
Listen to the Water-Carrier on Spotify.