Hang on back there.
4 seconds sound clip from the Star Wars: Episode IV - A New Hope (1977) movie soundboard.
You can hear this line at 01:48:57 in the Blu-ray version of the movie.
Quote context
[...]
- Several fighters have broken off from the main group. Come with me.
- Watch your back, Luke. Watch your back. Fighters above you, coming in.
- I'm hit, but not bad. R2, see what you can do with it.
- Red Six, can you see Red Five?
[...]