OK, Boomer, now you know what to do.
4 seconds sound clip from the The Fox and the Hound (1981) movie soundboard.
You can hear this line at 00:07:52 in the Blu-ray version of the movie.
Quote context
[...]
- Don't you worry now. We're going to find someone to look after you.
- Hmm. Hmm. Hey, I think I got an idea.
- OK, Boomer, now you know what to do.
- Yeah, leave it to me. Leave it to me.
- Who is it? Well, I was sure I heard someone knocking.
- Oh, you pesky birds! Will you come back here? Oh, stop!
[...]