I'm not going to bother with spoilers since anyone who cares is at this point has it done.
It's the one where You /pray at the Thaliak's altar in the crystal cave in Mor Dhona. He and Urianger commend you on the pilgrimage and tell you good luck and such.
I really like the song during that but can't find it on YouTube.
Anyone have a link to it? :3