I know that money can
be a SOURCE of friction
The Big Bang Theory Season 12, Episode 3
But not so deep as to introduce
a new SOURCE of friction."
The Big Bang Theory Season 2, Episode 5
Leonard, you are my roommate,
my SOURCE of transportation...
The Big Bang Theory Season 2, Episode 13
Can you see the SOURCE code
that's generating the response?
Westworld Season 2, Episode 6
So I went back to the SOURCE.
Game of Thrones Season 4, Episode 8