Who said "A warrior without honor is merely a murderer"?

This quote is attributed to Drogo.

A warrior without honor is merely a murderer - Drogo

"A warrior without honor is merely a murderer"

Drogo Justice

"I am the stallion who mounts the world"

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

"You are of my blood. That is enough"

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

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."