- Sir, you're in need of a soothsayer.
- How did you know?
- I'd be a fine soothsayer if I didn't.

8 seconds sound clip from the A Funny Thing Happened on the Way to the Forum movie soundboard.

You can hear this line at 00:37:10 in the Blu-ray version of the movie.

Quote context

[...]

- It was an eerie sound. Like the house was haunted.

- Sir, what I'm about to tell you is eerie. Your house is haunted. Haunted as the day is long.

- Perhaps you should stay with relatives, distant relatives.

- Yes. No. Fetch me a soothsayer. He must search my house at once.

(Pseudolus yelling)

- Sir, you're in need of a soothsayer.

- How did you know?

- I'd be a fine soothsayer if I didn't.

- Well, there's a spirit in my house.

- Silence! I'm about to say the sooth.

- You... I-I-I see it. I see everything. You-you have been... you have been abroad...

- For... Twenty years. You have been searching for... A child. No, no, no, two childs.

[...]