Once you begin, you have to be prepared for killing and more killing. And still more killing - until the reason for it has gone.
10 seconds sound clip from the The Magnificent Seven (1960) movie soundboard.
You can hear this line at 00:21:49 in the Blu-ray version of the movie.
Quote context
[...]
- Do you understand what it means when you start something like this?
- We will fight, too. Every one of us.
- When Calvera comes, the church bell will ring the alarm.
- We'll fight with guns, if we have them. If we don't, with machetes, axes, clubs, anything!
- Does every man in the village feel the same?
- I'll see what I can do for you.
- Now, wait. I didn't say I'll go. I'll just pass the word around that you're looking for men.
[...]