Who said "Adventure is the reward of the brave."?

This quote is attributed to Grey Worm.

Adventure is the reward of the brave. - Grey Worm

"Adventure is the reward of the brave."

Grey Worm Adventure

"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."

"The greatest adventure is life itself."

"The adventure of life begins with a single step."

"Adventure finds you when you stop running."

"Fortune and glory, kid."