
You took the OATH. You can't leave.
Game of Thrones Season 1, Episode 10

because he'd sworn an OATH
to your mother.
Game of Thrones Season 8, Episode 2

I swore an OATH, my lady.
Game of Thrones Season 4, Episode 5

And the wording of this OATH?
Game of Thrones Season 2, Episode 5

I'm ready to swear your OATH.
Game of Thrones Season 1, Episode 1