Who said "A Dothraki hears a word and takes it as a command"?

This quote is attributed to Drogo.

A Dothraki hears a word and takes it as a command - Drogo

"A Dothraki hears a word and takes it as a command"

Drogo Leadership

"I am the stallion who mounts the world"

"You are of my blood. That is enough"

"I will take what is mine with fire and blood"

"A man does what he will, not what he must"

"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"