
And my Lady Sansa...
has begged MERCY for her father.
Game of Thrones Season 1, Episode 9

Reject this gift,
and I shall show you no MERCY.
Game of Thrones Season 3, Episode 7

All I ask is MERCY.
Game of Thrones Season 1, Episode 8

Praying to the gods to have MERCY on us all.
Game of Thrones Season 2, Episode 9

you need to enter a formal plea for MERCY
and ask to be sent to the Wall.
Game of Thrones Season 4, Episode 6