If it please Your Grace,
he has taken a holy VOW of silence.
Game of Thrones Season 5, Episode 10
You've all learned
the words of the VOW.
Game of Thrones Season 1, Episode 7
How does the Night's Watch VOW go again?
Game of Thrones Season 5, Episode 3
You'll want to take your VOW
before a heart tree as your uncle did.
Game of Thrones Season 1, Episode 7
You swore a VOW.
Game of Thrones Season 6, Episode 4