The Fellowship of the Ring
"But it does not seem that I can trust anyone," said Frodo.
Sam looked at him unhappily. "It all depends on what you want," put in Merry. "You can trust us to stick to you through thick and thin – to the bitter end. And you can trust us to keep any secret of yours – closer than you keep it yourself. But you cannot trust us to let you face trouble alone, and go off without a word. We are your friends, Frodo. Anyway, there it is. We know most of what Gandalf has told you. We know a good deal about the Ring. We are horribly afraid – but we are going with you, or following you like hounds." (1.5.71-2)
"With your leave, Mr. Frodo, I'd say no! This Strider here, he warns and he says take care; and I say yes to that, and let's begin with him. He comes out of the Wild, and I never heard no good of such folk. He knows something, that's plan, and more than I like; but it's no reason why we should let him go leading us out into some dark place far from help, as he puts it." (1.10.30)
When he had dressed, Frodo found that while he slept the Ring had been hung about his neck on a new chain, light but strong. Slowly he dew it out. Bilbo put out his hand. But Frodo quickly drew back the Ring. [...]
The music and singing round them seemed to falter, and a silence fell. Bilbo looked quickly at Frodo's face and passed his hand across his eyes. "I understand now," he said. "Put it away! I am sorry: sorry you have come in for this burden: sorry about everything. (2.1.127-8)