Well, it's usual to say something like, Rest in Peace. Eternal Sleep. In Fond Memory of...
10 seconds sound clip from the The Cowboys (1972) movie soundboard.
You can hear this line at 02:10:38 in the Blu-ray version of the movie.
Quote context
[...]
- Stop him! Stop him! Stop him! Stop him!
- Well, it's usual to say something like, Rest in Peace. Eternal Sleep. In Fond Memory of...
- Was he a family man? Did he have any children?
- Yes.
- Well, then I carve: Beloved Husband and Father.
- I don't see it. It's gotta be around here somewhere. I remember that tree.
- There must've been a heavy rain. Washed it away.
- We ain't never gonna find it now.
[...]