Oh, dear. That's too wonderful to be true!
6 seconds sound clip from the The Wizard of Oz (1939) movie soundboard.
You can hear this line at 01:37:28 in the Blu-ray version of the movie.
Quote context
[...]
- I should've felt it in my heart.
- No. She had to find it out for herself.
- Now those magic slippers will take you home in two seconds.
- Now?
- Oh, dear. That's too wonderful to be true!
- Oh, it's... it's gonna be so hard to say goodbye. I love you all too.
- Oh, don't cry. You'll rust so dreadfully. Here. Here's your oilcan.
- Goodbye.
- Now I know I've got a heart because it's breaking.
[...]