That's right. Doc can go on day and night, and then some.
6 seconds sound clip from the Tombstone (1993) movie soundboard.
You can hear this line at 01:01:11 in the Blu-ray version of the movie.
Quote context
[...]
- Doc, you been hittin' it awful hard, haven't ya?
- Nonsense. I've not yet begun to defile myself.
- I was wonderin' if maybe you wouldn't wanna go on over to the Crystal Palace.
- I will not be pawed at, thank you very much.
- That's right. Doc can go on day and night, and then some.
- Have another one, my loving man.
- I'm in.
- Hey. Loving man, you been called.
[...]