We plant trees. Humans tear them up. The forest does not come back. If we kill the humans, we will save the forest.

10 seconds sound clip from the Princess Mononoke movie soundboard.

You can hear this line at 00:56:35.609 in the Blu-ray version of the movie.

Quote context

[...]

- You go before my fangs find you.

- We will not go.

- We will eat the human.

- Yes, let us eat the man creature.

- Are you crazy? Just what happened to make the ape tribe change this way? Since when do apes eat the flesh of a man?

- If we eat the human, we will steal his strength, and we will drive the other humans away. Give us the man creature.

- Stop this. You know you can't possess the humans' strength by eating them. All that'll do is make you into something else, something even worse than human.

- We plant trees. Humans tear them up. The forest does not come back. If we kill the humans, we will save the forest.

- You mustn't give up. We'll find a way. The Forest Spirit is with us. Go on planting your trees and someday we'll beat them.

- The Forest Spirit will not fight. We will all die.

- Wolf Girl does not care. She is human.

- Enough! I'll bite your head off, you chattering ape.

[...]