Who said "The Lannisters always pay their debts."?

This quote is attributed to Tyrion Lannister.

The Lannisters always pay their debts. - Tyrion Lannister

"The Lannisters always pay their debts."

Tyrion Lannister

Character in A Game of Thrones

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"A man's got to know his limitations."

"The gods flip a coin."

"That's what I do. I drink and I know things."

"Lannister always pays their debts."