
Old age is a wonderful SOURCE of ironies,
Game of Thrones Season 4, Episode 9

...caused by relative motion between
the SOURCE of the wave and the observer.
The Big Bang Theory Season 1, Episode 6

So to begin with, what are we saying
is the SOURCE of this money?
Breaking Bad Season 3, Episode 11

So I went back to the SOURCE.
Game of Thrones Season 4, Episode 8

Leonard, you are my roommate,
my SOURCE of transportation...
The Big Bang Theory Season 2, Episode 13