I'm sure there is no rule against substitution.
5 seconds sound clip from the Shogun Assassin 2 movie soundboard.
You can hear this line at 00:34:20 in the DVD version of the movie.
Quote context
[...]
- If you refuse that, there is but one other solution.
- Then I shall do it to fulfill the obligation.
- I have heard that prostitutes sometimes take the place of another who is sick.
- I'm sure there is no rule against substitution.
- But what if our intention is really to kill you during the process? What will happen then?
- No one can tell one's fate and fate decides life and death.
- Begin!
- Whip budibudee, whip budibudee, whip budibudee...!
[...]