- Sergeant, post your sentries.
- Yes, sir. Attention, company. Forward, march. Right face.

10 seconds sound clip from the Glory (1989) movie soundboard.

You can hear this line at 00:40:46 in the Blu-ray version of the movie.

Quote context

[...]

- Ain't that right, snowflake?

- You know, he ain't never been to no West Point, and the only reason he in charge is because his mommy and daddy fixed it. Ain't that so?

- You thought he was different, didn't you? What you think now?

- You just thought you was so smart, didn't you, nigger? Yeah, you in real school now though, ain't you? What you gonna do? Cry?

- Yeah, he sure enough learning now, ain't he?

- Sergeant, post your sentries.

- Yes, sir. Attention, company. Forward, march. Right face.

- Oh, shit.

- Young man say there's a farm ain't but two or three miles from here. Said the lady over there give him biscuits and gravy.

- She said, if he bring his friends, she feed them too.

- Don't even think about it.

[...]