Why, yes, that looks like the prayer Mah-Li had read at the temple.
4 seconds sound clip from the The Bitter Tea of General Yen movie soundboard.
You can hear this line at 01:09:29 in the Blu-ray version of the movie.
Quote context
[...]
- You'll never see her again round this ranch. Thanks to you, she skipped out.
- You'll believe it when we all pay for it with our necks.
- Ever see this before, Miss Davis?
- Why, yes, that looks like the prayer Mah-Li had read at the temple.
- Prayer! Prayer, my eye. That thing read at the temple?
- Why, there's enough dynamite in that to blow General Yen's province into the Yellow Sea.
- I told you you were crazy to listen to these screwy missionaries.
- That will be enough. Everything is going to be all right.
[...]