- Dad, how do you spell hallelujah?
- How should I know? What do you think I am, a dictionary?

— (James Stewart)

6 seconds sound clip from the It's a Wonderful Life (1946) movie soundboard.

You can hear this line at 01:30:22 in the Blu-ray version of the movie.

Quote context

[...]

- Oh, Mr. Welch? Okay, that's fine, Mr. Welch.

- Give me a chance to tell you what I really think of your wife.

- Will you get out and let me handle this?

- Hello? Hello? What? Oh, you will, huh?

- Okay, any time you think you're man enough, you... Hello! Any...

- Dad, how do you spell hallelujah?

- How should I know? What do you think I am, a dictionary?

- Tommy, stop that! Stop it!

- Haven't you learned that silly tune yet? You play it over and over again. Now stop it! Stop it!

- I'm sorry, Mary.

- Janie, I'm sorry. I didn't mean that. I... You go on and practice.

[...]