From "Maude: The New Housekeeper (#3.4)"
[Mrs. Naugatuck is cleaning the house while singing
] Listen to her. She's the perfect housekeeper. Sings like a bird and works like a horse.
Which is quite an improvement over your mother who works like a bird and sings like a horse.
[Screaming from upstairs
] GOD'LL GET YOU FOR THAT WALTER!
And has ears like a rabbit.