If your verdict be hasty and mistaken, you will forever after know no peace.

8 seconds sound clip from the Dark Command (1940) movie soundboard.

You can hear this line at 00:44:58 in the Blu-ray version of the movie.

Quote context

[...]

- Look at him, gentlemen. Look at his sister and his father. None deplore the spilling of blood more than they do.

- Their hearts are full of compassion for the family of the deceased.

- They are ready and eager to make whatever amends lie within their power.

- And already they have arranged to see that Mrs. Hale and her children are well cared for.

- Gentlemen, pain and torture are grim bedfellows.

- If your verdict be hasty and mistaken, you will forever after know no peace.

- You don't want a tragic mistake on your consciences to haunt you all the days of your life.

- You have families and futures to think of. When you vote, think of them.

- Bear them in mind when you seek a verdict.

- This same thing might have happened to anyone of you or to members of your family.

[...]