He'll have better luck trying to grow a new tail than that seed I gave him.
5 seconds sound clip from The New Adventures of Winnie the Pooh - Rabbit Takes a Holiday / Eeyi Eeyi Eeyore (S3E4).
You can hear this line at 00:12:47.956 in the Blu-ray version of the TV Series.
Quote context
[...]
- Good luck making that seed grow.
- Okay, little fella. Why don't you come on up for a look see?
- Why, Pooh. What a surprise. What are you doing here?
- Say, what's old Eeyore up to?
- He'll have better luck trying to grow a new tail than that seed I gave him.
- Well, if you'll excuse me, I have to get back to my own beautiful garden.
- Shy, huh? I won't peek. Just let me know when you're up, and want someone to talk to.
- Poor old donkey boy. I can't stand it. He's so lonesome, he's waiting for a seed to sprout.
- He's more than sad. He's miserababble.
[...]