Who said "A leader is only as strong as those who follow him."?

This quote is attributed to Grey Worm.

A leader is only as strong as those who follow him. - Grey Worm

"A leader is only as strong as those who follow him."

Grey Worm Leadership

"I am Grey Worm. I have no name."

"Unsullied do not fear death."

"We are the dragons' soldiers."

"A soldier's duty is to obey."

"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"