as a SOURCE of information
The Big Bang Theory Season 11, Episode 16
But not so deep as to introduce
a new SOURCE of friction."
The Big Bang Theory Season 2, Episode 5
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
Old age is a wonderful SOURCE of ironies,
Game of Thrones Season 4, Episode 9