Oh, well, nothing lasts forever.
4 seconds sound clip from The New Adventures of Winnie the Pooh - Home Is Where the Home Is (S4E5).
You can hear this line at 00:11:09.125 in the Blu-ray version of the episode.
Quote context
[...]
- And I really can't have anyone in my kitchen but me. So you won't be able to eat. And, uh...
- Are you sure mine is the home for you, Christopher Robin?
- But Rabbit, I've tried everywhere else.
- Thanks, Eeyore. I'd be honored to stay here.
- Oh, well, nothing lasts forever.
- I know you've done your best to help me, but I guess this something I gotta figure out on my own.
- I do wish we could help him.
- Yes, we should be able to help him somehow.
- Seems to me what he really needs is help finding his way home.
- Home! Of course! Why didn't I think of it before?
[...]