Who said "I've learned that mercy can be a weakness."?

This quote is attributed to Jon Snow.

I've learned that mercy can be a weakness. - Jon Snow

"I've learned that mercy can be a weakness."

Jon Snow Wisdom

"The things we love destroy us every time."

"I am of the night."

"The North Remembers."

"When the snows fall and the cold winds blow, the lone wolf dies, but the pack survives."

"I'm not angry, I'm just disappointed."

"The best things in life are free."

"You can't have everything in life, but you can have what matters most."

"A woman's intuition is rarely wrong."