Who said "What do we say to the god of death? Not today."?

This quote is attributed to Arya Stark.

What do we say to the god of death? Not today. - Arya Stark

"What do we say to the god of death? Not today."

Arya Stark Courage

Character in A Storm of Swords

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"All men must die"

"A girl has a name"

"I am no one."

"Fear cuts deeper than swords."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."