Leonard, it is a SOURCE of great pain
to me and my family...
The Big Bang Theory Season 4, Episode 18
Coins lodged in body parts
is not a SOURCE of amusement.
The Big Bang Theory Season 5, Episode 12
...caused by relative motion between
the SOURCE of the wave and the observer.
The Big Bang Theory Season 1, Episode 6
as a SOURCE of information
The Big Bang Theory Season 11, Episode 16
If this man had his own SOURCE
of product on this side of the border...
Breaking Bad Season 3, Episode 9