Who said "Beauty is fleeting, but duty is forever."?

This quote is attributed to Catelyn Stark.

Beauty is fleeting, but duty is forever. - Catelyn Stark

"Beauty is fleeting, but duty is forever."

Catelyn Stark

Character in A Clash of Kings

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"The things we love destroy us every time."

"The living should grieve the living, and let the dead tend the dead."

"My son was not a craven."

"The gods are not done with us yet"