Now, Roo, dear, it isn't polite to bother someone when they're pretending to be a mailbox.
7 seconds sound clip from The New Adventures of Winnie the Pooh - Un-Valentine's Day (S2E5).
You can hear this line at 00:06:31.785 in the Blu-ray version of the TV Series.
Quote context
[...]
- I never remembered Valentine's Day to be so confusing.
- I must find the real valentine giver, and give him a piece of my mind. And a valentine.
- Oh, dear. Now I have to make Pooh a valentine, too, or... or he'll think I'm ungrateful.
- I do hope Rabbit doesn't find out. Oh, dear. Oh, d-d-dear.
- Now, Roo, dear, it isn't polite to bother someone when they're pretending to be a mailbox.
- A mailbox for secret valentines only, if you please.
- Oh, bother. My disguise doesn't seem to be working.
- Aw. I think the mailbox is sad, Mama.
- Maybe a valentine would cheer him up.
[...]