
I'll teach you. I'll come when
Bert's on DUTY and teach you.
Game of Thrones Season 3, Episode 5

Great or small, we must do our DUTY.
Game of Thrones Season 3, Episode 8

it is not only the sworn DUTY of a maester
Game of Thrones Season 2, Episode 9

I'm performing my sworn DUTY
as Hand of the King.
Game of Thrones Season 4, Episode 6

I tried to do my DUTY
as a wife, that is all.
Game of Thrones Season 3, Episode 2