Thomas Mara Junior.
4 seconds sound clip from the Miracle on 34th Street (1947) movie soundboard.
You can hear this line at 01:19:18 in the Blu-ray version of the movie.
Quote context
[...]
- Your Honor, the burden of proof for this ridiculous contention clearly rests with my opponent.
- Can he produce any evidence to support his views?
- If Your Honor please, I can.
- Will Thomas Mara please take the stand?
- Who, me?
- Tommy, you know the difference between telling the truth and telling a lie, don't you?
- Gosh, everybody knows you shouldn't tell a lie, especially in court.
[...]