You'll never find it.
4 seconds sound clip from the Psycho (1960) movie soundboard.
You can hear this line at 01:18:39 in the Blu-ray version of the movie.
Quote context
[...]
- Bust in on Arbogast and the old lady... Maybe shake her up.
- Yes!
- That wouldn't be a wise thing to do.
- Patience doesn't run in my family, Sam. I'm going out there.
- I don't know. One of us has to be here, in case he's on the way.
- What am I supposed to do, just sit here and wait?
[...]