- He'd never let you go.
- And could I ever leave him?

3 seconds sound clip from the Helen of Troy (1956) movie soundboard.

You can hear this line at 01:21:05.666 in the Blu-ray version of the movie.

Quote context

[...]

- You are good.

- The high priest says that even the gods fight each other. Some for Athena and Greece, some for Troy and Aphrodite. How, then, could I blame you for this war?

- I could stop it.

- There's no one who could.

- I could... if I return to the Greeks, to Menelaus.

- Go back to someone you so despise?

- Oh, if it would bring an end to war and restore Paris to the love of the Trojans...

- He'd never let you go.

- And could I ever leave him?

- You must help me to decide.

- Would you defy the Fates? No mortal should attempt so much, Helen.

- And yet I wonder, is one so lovely quite mortal?

- Lovely? No. I am everything I was determined not to be. I have only been selfish.

[...]