Chapter 12-What are dragon's words about dwarves that has Bilbo worried?

Smaug's words;

"I suppose you got a fair price for that cup last night?" he went on. "Come now, did you? Nothing at all! Well, that's just like them. And I suppose they are skulking outside, and your job is to do all the dangerous work and get what you can when I'm not looking-for them? And you will get a fair share? Don't you believe it! If you get off alive, you will be lucky."

Thorin's words;

"We knew it would be a desperate venture," said Thorin, "and we know that still; and I still think that when we have won it will be time enough to think what to do about it. As for your share, Mr. Baggins, I assure you we are more than grateful and you shall choose you own fourteenth, as soon as we have anything to divide, am sorry if you are worried about transport, and I admit the difficulties are great-the lands have not become less wild with the passing of time, rather the reverse-but we will do whatever we can for you, and take our share of the cost when the time comes. Believe me or not as you like!"