Who said "A man must do his duty, however hard that might be."?

This quote is attributed to Ned Stark.

A man must do his duty, however hard that might be. - Ned Stark

"A man must do his duty, however hard that might be."

Ned Stark Work

"The man who passes the sentence should swing the sword."

"Winter is coming."

"I am of the night."

"The North remembers."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."