My son would be most distressed by that.

6 seconds sound clip from the Braveheart (1995) movie soundboard.

You can hear this line at 02:18:57 in the Blu-ray version of the movie.

Quote context

[...]

- Very well. Pick a flock of your finest assassins and set a meeting.

- Milord, Wallace is renowned for his ability to smell an ambush.

- If what Lord Hamilton tells me is correct, he warmed to our future queen and would trust her.

- So we'll dispatch her with the notion that she comes in peace.

- Milord, the princess might be taken hostage or her life be put in jeopardy.

- My son would be most distressed by that.

- But in truth, if she were to be killed, we would soon find the king of France a useful ally against the Scots.

- You see, as king, you must find the good in any situation.

- It's William Wallace, sure. He's given up his sword. Be ready.

- Milady, I received your message.

[...]