
You belong to me now.
It is your DUTY to tell me the truth.
Game of Thrones Season 3, Episode 3

And what is DUTY...
Game of Thrones Season 1, Episode 9

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

It's your DUTY to represent your House
when your father can't.
Game of Thrones Season 1, Episode 6

Go on, do your DUTY.
Game of Thrones Season 5, Episode 10