- Well, if Christopher Robin's sending cards, we're going to have to send him one, too... in self-defense.
- We should.

Tigger (Paul Winchell)

9 seconds sound clip from The New Adventures of Winnie the Pooh - Un-Valentine's Day (S2E5).

You can hear this line at 00:12:31.160 in the Blu-ray version of the TV Series.

Quote context

[...]

- Say, who's the guilty party around here?

- Who broke the promise, Mama?

- Speak up, whoever you are.

- Why, I don't know, dear.

- Order. Order! Order!

- Perhaps it was someone who didn't know about our promise. Someone like... Christopher Robin.

- Pooh, you're right. He didn't know. It must have been him.

- Well, if Christopher Robin's sending cards, we're going to have to send him one, too... in self-defense.

- We should.

- I thought I saw a card around here somewhere.

- No. No!

- Oh, my. This won't do.

- This card's for Groundhog's Day.

- Where did this come from?

- Say, these are all used valentines. We got to have a new one for Christopher Robin.

[...]