If this man had his own SOURCE
of product on this side of the border...
Breaking Bad Season 3, Episode 9
...competed
over the same food SOURCE...
The Big Bang Theory Season 4, Episode 18
So I went back to the SOURCE.
Game of Thrones Season 4, Episode 8
...caused by relative motion between
the SOURCE of the wave and the observer.
The Big Bang Theory Season 1, Episode 6
I know that money can
be a SOURCE of friction
The Big Bang Theory Season 12, Episode 3