Game of Thrones, Season 2

Brienne of Tarth:
Once you're safely back amongst your own people, will you give me leave to go, My Lady?

Catelyn Stark:
You mean to kill Stannis.

Brienne of Tarth:
I swore a vow.

Catelyn Stark:
But Stannis has a great army around him. His own guards are sworn to keep him safe.

Brienne of Tarth:
I'm as good as any of them. I should never have fled.

Catelyn Stark:
Renly's death was no fault of yours. You served him bravely.

Brienne of Tarth:
I only held him that once as he was dying.

Catelyn Stark:
He's gone, Brienne. You serve nothing and no one by following him into the earth. Renly's enemies are Robb's enemies as well.

Brienne of Tarth:
I do not know your son, My Lady, but I could serve you if you would have me. You have courage. Not battle courage perhaps, but, I don't know, a woman's kind of courage. And I think that when the time comes, you will not hold me back. Promise me that you will not hold me back from Stannis.

Catelyn Stark:
When the time comes, I will not hold you back.

Brienne of Tarth:
[offers her sword to Catelyn] Then I am yours, My Lady. I will shield your back and will give my life for yours if it comes to that. I swear it by the Old Gods and the New.

Catelyn Stark:
[takes Brienne's hand] I vow that you shall always have a place in my home and at my table, and that I shall ask no service of you that might bring you dishonor. I swear it by the Old Gods and the New.