She's SWORN to protect
both of Catelyn Stark's girls.
Game of Thrones Season 7, Episode 6
I've SWORN to serve the Lord of Riverrun
and obey his commands.
Game of Thrones Season 6, Episode 8
A maester of the Citadel, chained and SWORN,
Game of Thrones Season 5, Episode 7
But I'm a SWORN brother
of the Night's Watch now.
Game of Thrones Season 5, Episode 1
But I could have SWORN I read
the last King in the North
Game of Thrones Season 7, Episode 3