Who said "Work without passion is merely toil."?

This quote is attributed to Drogon.

Work without passion is merely toil. - Drogon

"Work without passion is merely toil."

Drogon Work

"I am fire. I am death."

"Dracarys."

"A dragon is not a slave."

"I will burn them all."

"Hard work never killed anybody."

"Work with purpose and integrity."

"Hard work pays off in the end."

"A man's gotta do what a man's gotta do."