Who said "I will stand. I will fight. I will not yield. This is my oath."?

This quote is attributed to Grey Worm.

I will stand. I will fight. I will not yield. This is my oat... - Grey Worm

"I will stand. I will fight. I will not yield. This is my oath."

Grey Worm Perseverance

"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."

"Perseverance is the key to success."

"Don't give up on what you believe in."

"I've been through worse."

"You learn to live with the pain."