- I'm awful glad you two are friends.
- We may not be when we think this thing over.

8 seconds sound clip from the El Dorado (1966) movie soundboard.

You can hear this line at 00:05:59 in the Blu-ray version of the movie.

Quote context

[...]

- What's so funny?

- This whole thing.

- Do you know what she's laughing about?

- I gather you knew him before you knew me.

- Before you? I knew her when she was a kid!

- Didn't you know that?

- No. You never mentioned that.

- Up until now, I thought you had good taste.

- And up until now, I thought she had good taste.

- I'm awful glad you two are friends.

- We may not be when we think this thing over.

- If you hurt him, I'm through with both of you.

- You know something, I think we better get ourselves a new girl.

- Yeah.

- Better not.

- Why not?

- I'm girl enough for both of you. Say, can I buy you a drink?

- Well, I'd like that very much, but I promised .P. I'd do something for him. Didn't I?

- Yes, you did.

[...]