Just stay out of trouble.
2 seconds sound clip from the The Secret of NIMH (1982) movie soundboard.
You can hear this line at 00:34:05.961 in the Blu-ray version of the movie.
Quote context
[...]
- Now, whatever you do, don't tell them where I am.
- My lips are sealed, Mrs. Bris.
- Bye!
- By that big stone in the garden.
[...]