Answer:
Any quote that Thorin says? Since you did not specify anything in particular, here is one which I just randomly opened The Hobbit to.
"You! You!" cried Thorin, turning upon [Bilbo] and grasping him with both hands, "You miserable hobbit! You undersized -- burglar!" he shouted at a loss for words, and he shook poor Bilbo like a rabbit. "By the beard of Durin! I wish I had Gandalf here! Curse him for his choice of you! May his beard wither! As for you I will throw you into the rocks!" he cried and lifted Bilbo in his arms.
That wasn't a very amiable quote, I must say. I don't want you to get any queer impressions of dear Thorin, may he rest in peace, since that is not at all his normal manner. Therefore, here is another quote by him, which describes his character quite well.
" 'We are met to discuss our plans, our ways, means, policy and devices. We shall soon before the break of day start on our long journey, a journey from which some of us, or perhaps all of us (except our friend and counsellor, the ingenious wizard Gandalf) may never return. It is a solemn moment. Our object is, I take it, well known to us all. To the estimable Mr Baggins, and perhaps to one or two of the younger dwarves (I think I should be right in naming Kili and Fili, for instance), the exact situation at the moment may require a little brief explanation -- '
This was Thorin's style. He was an important dwarf. If he had been allowed, he would probably have gone on like this until he was out of breath, without telling anyone there anything that was not known already."