Who said "To lead is to serve those you lead."?

This quote is attributed to Missandei.

To lead is to serve those you lead. - Missandei

"To lead is to serve those you lead."

Missandei Leadership

"I am Missandei of Naath, interpreter and advisor to the Dragon Queen."

"Daenerys Targaryen chose to free us, not because she needed us, but because it was right."

"Knowledge is power, but wisdom is knowing how to use it."

"I have served many masters, but I chose to serve the Mother of Dragons."

"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"