Don't keep the doctor waiting, dear. It's rude.
3 seconds sound clip from the Harvey (1950) movie soundboard.
You can hear this line at 01:37:17.207 in the Blu-ray version of the movie.
Quote context
[...]
- Mr. Lofgren, let me give you one of my cards.
- Now, my sister and my charming young niece live at that address with me.
- Wouldn't you and your brother like to come and have dinner with us sometime?
- When? When would you be glad to?
- Well, I couldn't come any night but tomorrow. I'm on duty all the rest of the week.
- Well, tomorrow would be perfect. We'll be expecting you and delighted to see you. Won't we, Veta?
- Oh, Elwood, I'm sure this man has friends of his own.
- You can't have too many friends.
- Don't keep the doctor waiting, dear. It's rude.
- You could just as well have waited.
- Oh, no.
[...]