I don't have my book handy on me right now, but I believe it was in chapter 21 (uncertain of the page number) or close to it.
"Yea, I will drink thy blood gladly, that so I may forget the blood of Beleg my master, and the blood of Brandir slain unjustly. I will slay thee swiftly."
I'm fairly certain everyone knows this one
but it's one of the ones I have memorized, given as I have previously stated, I don't have my book.