I swore a VOW.
Game of Thrones Season 2, Episode 5
You swore a VOW.
Game of Thrones Season 6, Episode 4
I swore a VOW to the Night's Watch.
Game of Thrones Season 5, Episode 2
If it please Your Grace,
he has taken a holy VOW of silence.
Game of Thrones Season 5, Episode 10
So you made a sacred VOW to the enemy.
Game of Thrones Season 4, Episode 4