You want to PROVE yourself a Bolton?
Game of Thrones Season 4, Episode 2
You want to PROVE your value to the queen?
Prove it right here in Meereen.
Game of Thrones Season 5, Episode 10
since I cannot PROVE that you are not mine.
Game of Thrones Season 3, Episode 1
I'll PROVE my worth.
Game of Thrones Season 5, Episode 6
It could PROVE useful for my work.
Game of Thrones Season 5, Episode 2