'The three companions now left the hill-top, where they might be an easy mark against the pale sky, and they walked slowly down the northward slope. A little above the hill's foot they halted, and wrapping their cloaks about them, they sat huddled together upon the faded grass. The time passed slowly and heavily. The wind was thin and searching. Gimli was uneasy. 'What do you know of these horsemen, Aragorn?' he said. 'Do we sit here waiting for sudden death?'...
'You will soon learn the truth,' said Legolas. 'Already they approach.'

JRR Tolkien: The Lord of the Rings: The Two Towers: Book III, Chapter 2: The Riders of Rohan