I'm sorry I brought this upon you, my boy. I'm sorry that you must carry this burden.
10 seconds sound clip from the The Lord of the Rings: The Fellowship of the Ring movie soundboard.
You can hear this line at 01:48:11 in the Blu-ray version of the movie.
Quote context
[...]
- Mithril. As light as a feather, and as hard as dragon scales.
- Let me see you put it on. Come on.
- I should very much like to hold it again, one last time.
- I'm sorry I brought this upon you, my boy. I'm sorry that you must carry this burden.
- The Ring-bearer is setting out on the Quest of Mount Doom.
- On you who travel with him, no oath nor bond is laid to go further than you will.
- Farewell. Hold to your purpose. May the blessings of Elves, and Men, and all Free Folk, go with you.
[...]