Who said "A leader must serve those he leads, not the reverse."?

This quote is attributed to Oberyn Martell.

A leader must serve those he leads, not the reverse. - Oberyn Martell

"A leader must serve those he leads, not the reverse."

Oberyn Martell Leadership

"I am the viper. When the time comes, I will strike."

"Elia of Dorne. My sister. You raped her. You murdered her children."

"I want to look the man in the eye and see the fear in his heart."

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

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"