Tywin Lannister: I grant you, it was done too brutally. Elia need not have been harmed at all, that was sheer folly. By herself she was nothing.
Tyrion Lannister: Then why did the Mountain kill her?
Tywin Lannister: Because I did not tell him to spare her. I doubt I mentioned her at all. I had more pressing concerns. (…) Nor did I yet grasp what I had in Gregor Clegane, only that he was huge and terrible in battle. The rape…even you will not accuse me of giving that command, I would hope.