His parents.
3 seconds sound clip from the Batman Returns (1992) movie soundboard.
You can hear this line at 00:36:53 in the Blu-ray version of the movie.
Quote context
[...]
- And then, with my parents try to understand why.
- Why they did what I guess they felt they had to do to a child who was born a little different.
- A child who spent his first Christmas and many since in a sewer.
- Mr. Wayne? Is something wrong?
- No.
- Again, this scene, direct from Gotham Plaza where we have just witnessed...
- Here he is, standing alongside Gotham's leading citizen, Max Shreck.
- How about a statement? People want to know.
- Penguin's not to be disturbed.
[...]