Who said "I have walked through fire and only grown stronger."?

This quote is attributed to Drogon.

I have walked through fire and only grown stronger. - Drogon

"I have walked through fire and only grown stronger."

Drogon Perseverance

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"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."