Who said "Stannis is the one true king"?

This quote is attributed to Davos Seaworth.

Stannis is the one true king - Davos Seaworth

"Stannis is the one true king"

Davos Seaworth

Character in A Storm of Swords

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"There is no creature on earth half so terrifying as a truly just man."

"Time is the greatest judge."

"The storm makes iron brittle."

"The dead do not return."