Who said "I am a slow learner, it's true. But I learn."?

This quote is attributed to Oberyn Martell.

I am a slow learner, it's true. But I learn. - Oberyn Martell

"I am a slow learner, it's true. But I learn."

Oberyn Martell Education

"I am the viper. When the time comes, I will strike."

"Elia of Dorne. My sister. You raped her. You murdered her children."

"I want to look the man in the eye and see the fear in his heart."

"The man who passes the sentence should swing the sword."

"Education opens doors."

"Education opens doors to endless possibilities."

"I ain't got the education you got, bub."

"You can't put a price on history."