It was his DUTY. He never liked it.
Game of Thrones Season 2, Episode 7
...starting tomorrow at 0700 hours,
but until then, you are all off DUTY.
The Big Bang Theory Season 2, Episode 23
..."Call of Duty 3," "Rock Band"...
The Big Bang Theory Season 3, Episode 13
I believe you both have guard DUTY tonight.
Game of Thrones Season 5, Episode 7
It is my DUTY to tell you
Game of Thrones Season 5, Episode 7