The Return of the King
Aragorn looked at them, and there was pity in his eyes rather than wrath; for these were young men from Rohan, from Westfold far away, or husbandmen from Lossarnach, and to them Mordor had been from childhood a name of evil, and yet unreal, a legend that had no part in their simple life; and now they walked like men in a hideous dream made true, and they understood not this war nor why fate should lead them to such a pass.
"Go!" said Aragorn. "But keep what honour you may, and do not run! And there is a task which you may attempt and so be not wholly shamed. Take your way south-west till you come to Cair Andros, and if that is still held by enemies, as I think, then re-take it, if you can; and hold it to the last in defence of Gondor and Rohan!" (5.10.20-21)
"Water, water!" muttered Sam. He had stinted himself, and in his parched mouth his tongue seemed thick and swollen; but for all his care they now had very little left, perhaps half his bottle, and maybe there were still days to go. All would long ago have been spent, if they had not dared to follow the orc-road. For at long intervals on that highway cisterns had been built for the use of troops sent in haste through the waterless regions. In one Sam had found some water left, stale, muddied by the orcs, but still sufficient for their desperate case. Yet that was now a day ago. There was no hope of anymore. (6.3.17)
"I am glad that you are here with me," said Frodo. "Here at the end of all things, Sam."
"Yes, I am with you, Master," said Sam, laying Frodo's wounded hand gently on his breast. "And you're with me. And the journey's finished. But after coming all that way I don't want to give up yet. It's not like me, somehow, if you understand." (6.4.15-16)