Cassie, flying will lead to no good.
3 seconds sound clip from The New Adventures of Winnie the Pooh - Find Her, Keep Her (S1E4).
You can hear this line at 00:12:13.865 in the Blu-ray version of the TV Series.
Quote context
[...]
- It shall be my pleasure, my dear.
- A little practice, and... and well, you'll be able to fly south for the winter. Oh, yes.
- Fly south? Never! You keep your big feathers out of this!
- Why, if she were meant to fly south, she... she'd have wings. Ha. So there.
- But, Rabby, I do have wings.
- Cassie, flying will lead to no good.
- Remember the promise you made me about not going too high?
- Good. Ha ha. Ahem. Then no more talk about flying.
- Ho ho. We're going to have lots more fun than flying.
- Oh, Pooh Bear. Please don't tell Rabby I'm learning to fly. It would... It would make him so sad.
[...]