I'll teach you. I'll come when
Bert's on DUTY and teach you.
Game of Thrones Season 3, Episode 5
Love is the death of DUTY.
Game of Thrones Season 1, Episode 9
and I've always done my DUTY.
Game of Thrones Season 2, Episode 8
All the Kingsguard will be on DUTY.
Game of Thrones Season 4, Episode 1
It is our DUTY to stop him.
Game of Thrones Season 6, Episode 7