Totally offtopic: Parsifal in Mahler's 10th?

[Jost Ammon <jammon@gmx.net>]

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