Who said "The cost of loyalty is far less than the cost of betrayal."?

This quote is attributed to Lannister.

The cost of loyalty is far less than the cost of betrayal. - Lannister

"The cost of loyalty is far less than the cost of betrayal."

Lannister Friendship

"A Lannister always pays his debts."

"I am the god of tits and wine."

"You are an awful man."

"I drink and I know things."

"Friendship is built on trust and honesty."

"True friendship is worth more than gold."

"Good friends are like stars, always there even when you can't see them."

"Friendship means sacrifice."