Who said "A Lannister always pays his debts."?

This quote is attributed to Tyrion Lannister.

A Lannister always pays his debts. - Tyrion Lannister

"A Lannister always pays his debts."

Tyrion Lannister Justice

Character in A Clash of Kings

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"I drink and I know things"

"I drink and I know things."

"Never forget what you are, for surely the world will not."

"All dwarfs may be bastards, yet not all bastards are dwarfs."

"Justice must always prevail."

"You think I'm just some animal?"

"Fighting for what's right never gets easier."

"Justice is worth fighting for."