That's very true. I'd have read it long ago, if he'd wanted.

6 seconds sound clip from the Executioners From Shaolin (1977) movie soundboard.

You can hear this line at 01:20:54 in the DVD version of the movie.

Quote context

[...]

- Many times I asked for his help, but then, he refused to teach me Tiger style. because you were teaching me Crane style. And so, I don't...

- Your father has a Tiger kung fu manual. In the old days, he read it every day. I wonder where he put it.

- I found it!

- Give it here.

- Why won't you give it to me?

- Ma. You and Dad agreed never to learn each other's kung fu. Then you shouldn't read Dad's training manual.

- That's very true. I'd have read it long ago, if he'd wanted.

- That's right. Dad's not here now, Ma. So you'd better not read it.

- So you want me to follow the instructions and learn Tiger style?

- Yes.

- Ma, I'll do as you say. I'll practice day and night. First, I'll read this.

- Good boy.

[...]