Totally offtopic: Parsifal in Mahler's 10th?

[Jost Ammon <jost.ammon@gmx.de>]

Just an offtopic question to this group, because at the moment I don't
 know where to ask.

 Yesterday I went to listen for the first time in my life Wagner's
 Parsifal. Somewhere I think in the 2nd act, I thought I heard clearly a
 motive that Mahler has very early in the
 1st set of the 10.th symphony. Now I have no Parsifal on CD, tape or
 whatsoever.

 Did I hear correctly? Could someone at least point to where I could find
 an answer? The theme is repeated towards the end I think. That's so
 thrilling.

 Jost