Who said "A death debt is never forgotten"?

This quote is attributed to Catelyn Stark.

A death debt is never forgotten - Catelyn Stark

"A death debt is never forgotten"

Catelyn Stark

Character in A Storm of Swords

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"Oath or no, a man does what he will"

"The gods don't care if you are good."

"A heart full of love is a heart full of wounds."

"The things we love destroy us every time."