You know something? One of my ancestors imported the first Irish thoroughbred into our county.

7 seconds sound clip from the The Asphalt Jungle (1950) movie soundboard.

You can hear this line at 00:26:58 in the Blu-ray version of the movie.

Quote context

[...]

- Did that really happen, Dix, when you were a kid?

- Not exactly.

- The black colt pitched me into a fence on the first buck.

- My old man come over, prodded me with his boot and said, Maybe that'll teach you not to brag about how good you are on a horse.

- It's nice to hear you laugh.

- You know something? One of my ancestors imported the first Irish thoroughbred into our county.

- Is that a fact?

- Sure.

- Why, our farm was in the family for generations. One hundred sixty acres. Thirty in bluegrass and the rest in crops. Fine barn and seven brood mares.

- Sounds wonderful, Dix.

- It was.

- And then everything happened at once. My old man died, and we lost our corn crop.

[...]