Let this sleeping dog lie, son.
5 seconds sound clip from the An American Tail: Fievel Goes West movie soundboard.
You can hear this line at 00:54:09 in the Blu-ray version of the movie.
Quote context
[...]
- Boy, I wish Wylie Burp was here.
- You do?
- Well, then, he... He... He's right here.
- Where?
- The old dog's right under your whiskers, lad.
- Wylie Burp, Sheriff? Wow! We need you, Sheriff Burp!
- The cats are gonna turn us into mouse burgers! You gotta help us now!
- Let this sleeping dog lie, son.
- I'm going to the dogs in a dog-eat-dog world, son.
- I'm... I'm so far over the hill, I'm on the bottom of the other side.
- But you know, I... I think I might be able to help you.
[...]