Look, I can give you every assurance that Ferris is home, and he is very ill. In fact, I debated whether or not I should even leave him.

9 seconds sound clip from the Ferris Bueller's Day Off movie soundboard.

You can hear this line at 00:10:16 in the Blu-ray version of the movie.

Quote context

[...]

- Wake up and smell the coffee, Mrs. Bueller.

- It's a fool's paradise. He is just leading you down the primrose path.

- I can't believe it.

- I've got it right here in front of me. He has missed nine days.

- I asked for a car, I got a computer. How's that for being born under a bad sign?

- Grace? Grace!

- Look, I can give you every assurance that Ferris is home, and he is very ill. In fact, I debated whether or not I should even leave him.

- Grace!

- I can appreciate how this time of year children are prone to taking the day off.

- However, in Ferris' case, I can assure you, he is truly a very sick boy.

(FERRIS PLAYING TRUMPET OFF-KEY)

[...]